Firefox 3 vs. Opera 9.5
Over the last few years, Mozilla has taken quite a large slice of the internet browser market. Its community-developed Firefox, is now already in its 3rd version, which has been released today. Firefox has been praised for its security features, and often declared safer than Microsoft’s Internet Explorer by security experts. The new Firefox boasts, in addition to a comprehensive redesign of its looks and a host of new features, several new security enhancements which promise to make it even more secure.
But Firefox isn’t the only player in the web browser game. Another recent player is Opera. Actually, it’s not new, per se. Several years ago, before Firefox’s breakthrough into the market, Opera was a paid browser. Later, Opera released an ad-supported free version, and then finally released a fully free version, without any advertising whatsoever, in order to try and capture a larger market share. The release of various beta versions of Firefox 3 took most of the attention of the media, however, and the news about the release of the new 9.5 version of Opera was overlooked. Along with an update of its appearance, the addition of several new gadgets and features, and speed optimization, Opera added a security feature which is very similar to one offered by Firefox 3; both of these enhancements will be described later in this article.
So, is Opera a real player in the browser scene? Can it beat the unbeatable? Let’s find out.
Firefox 3 is a major update to the successful Firefox 2. The interface has been redesigned, and even with the default skin it looks pretty good, and has sleek animations. Notable interface updates include: a redesigned Download Manager that includes an information bar in the browser window; the ability to tag bookmarks; the ability to save open tabs for the next session; Add-On download manager (download add-ons without visiting Mozilla’s site); and many more features. Also, it has undergone tweaking to enhance its speed, and Mozilla claims that it’s now twice as fast as Firefox 2 when loading applications like Gmail. However, I didn’t notice any visible improvement. Major new security features include complex anti-phishing tools - Firefox 3 will hide the content of web pages that are suspected forgeries and warn you when entering pages that distribute malware, using an online database of known sites that was created by Google and StopBadware.org. Also, Firefox 3 gives you easy access to SSL certificates (which are presented in an easy-to-read manner) by clicking near the address bar with your mouse.
Firefox 3 with its new History Search feature, which searches addresses by keywords.
Opera’s new feature list is not as impressive, but it does offer several new features and gadgets, such as the Quick Find, which allows you to search for a website that you have visited over the last few days. Other new features include the ability to swap links and favorites between your Opera cellphone browser and your PC Opera, and a new browser engine that’s supposed to be much quicker than the old one. Opera also added a major security feature, which is similar to that offered by Firefox: the Fraud & Malware protection uses an online database to find a list of ‘bad sites’ and protect you from going to them. Unlike Firefox, that list is maintained by HauteSecure, which is a professional company, and the database is supported by the user community (description of ‘bad sites’, addition of new entries, etc).
But how do previous versions of Firefox and Opera rank against current versions, in terms of security? You’d be surprised by the results. According to Secunia, as of May 2008, Firefox 2.x.x has 23 security vulnerabilities, out of which 3 remain unfixed. Compared to this, Opera 9.x has 14 security vulnerabilities, with all fixed. Internet Explorer ranks last, with 9 out of 28 vulnerabilities that remain unfixed.
As for performance, previous versions of Firefox were known for their heavy resource usage, especially when operating with many extensions. Load times took literally tens of seconds, and the memory consumption often went above the 100mb mark on my machine. Firefox 3 claims to have improved this, but in fact, I had higher memory consumption than I had in Firefox 2. With 5 open websites (in tabs) and not a lot of extensions, Firefox 3 takes up more than 160mb of memory, which is a significant amount. With the same pages open, however, Opera used only 98mb of memory.
So, Opera proves to be a better performer than Firefox, and it feels faster while loading pages, too. To confirm this, I ran 2 different tests to check the rendering speed of web pages (that is, how fast a browser processes a certain type of code). First, I ran the CSS Benchmark Test by nontroppo. I ran the test 5 times on each browser. Firefox 3 took an average of 269ms to complete the test, while Opera excelled at 178ms average. Internet Explorer came last with 434ms average. Next, I ran the Javascript test by Celtic Kane. Again, I did 5 tests with each browser - Firefox again was second with 303ms, Opera first with 203ms, and Internet Explorer last with a whooping 1931ms, which is almost 2 seconds. On startup, Opera felt a bit faster than Firefox, but that wasn’t too big of a difference.
Opera’s interface, with the new Quick Dial feature.
When it comes to interface, it’s very much a personal choice. Opera doesn’t have community developed extensions, but many extensions that are common on Firefox, such as Adblock, are already built into Opera, which contributes to its speed. I also liked some of Opera’s cool features, such as the Speed Dial feature (when opening a new tab, instead of a blank page you get a choice of 9 of your most favorite pages to choose from), and the built-in IRC client.
In summary, unless you are an extension addict, you should give Opera 9.5 a try. It will surprise you. It’s faster and lighter than Firefox, and promises to be more secure. Unfortunately, unlike Firefox, Opera doesn’t have the huge database of community-made extensions, which is one of its only drawbacks.
Yukin said,
Wrote on June 19, 2008 @ 7:53 am
I followed your suggestion and gave Opera a try.
and extremely impressive too.
On my computer, Firefox 3 with 5 open tabs and some 14 add-ons takes 92MB, while freshly installed Opera takes 90MB. And from my experience, Firefox 3 is definitely a lot faster than Firefox 2. Even though I didn't check the memory usage for firefox 2 to compare, 3 it's definitely A LOT faster than 2. Though Opera is faster
Tal said,
Wrote on June 19, 2008 @ 9:28 am
Well, possibly there are other things that influence their performance - but it's a well known fact that Opera is faster than Firefox.
anonymous said,
Wrote on June 19, 2008 @ 11:01 am
"Opera’s new feature list is not as impressive, but it does offer several new features and gadgets..."
Sure thing, but that comment is sooo biased... take a quick look at FireFox 3 new features you mentioned:
"The interface has been redesigned, and even with the default skin it looks pretty good, and has sleek animations." Same with Opera
"Notable interface updates include: a redesigned Download Manager that includes an information bar in the browser window;" Already in Opera
"the ability to tag bookmarks;" Already in Opera
"the ability to save open tabs for the next session;" Already in Opera, even has a session manager since version 6 or so.
"Add-On download manager (download add-ons without visiting Mozilla’s site);" Opera has fewer add-ons, and some of them can be automatically downloaded when used for first time.
"Major new security features include complex anti-phishing tools..." Opera already has anti-phishing tools and 9.5 added anti-malware protection.
"Also, Firefox 3 gives you easy access to SSL certificates (which are presented in an easy-to-read manner) by clicking near the address bar with your mouse." More of the same
Overall, most of the new features mentioned and much more are implemented in Opera for more than 5 years, and comments like the one that caugh my eye leave the impression that Opera is inferior to FireFox, when is FF guys who are playing catch since the beginning.
EricJH said,
Wrote on June 19, 2008 @ 11:28 am
Opera has the equivalent functionality of at least 150 extensions hard coded. Despite the lack of extension Opera is very customisable. That has not quite been the subject of reviews.
The UI can be heavily customised; menus can be edited.... Mouse gestures come as a default tool. Widgets and user javascript (with support for Greasemonkey) add to that.
And of course is a fast browser.
Eric said,
Wrote on June 19, 2008 @ 11:40 am
I will go with opera. Sorry but firefox just dont impress me. Though ie will always be my main browser.
EricJH said,
Wrote on June 19, 2008 @ 12:51 pm
If you have any questions visit the My Opera Forums: http://my.opera.com/community/forums/forum.dml?id=26 .
Antti said,
Wrote on June 19, 2008 @ 2:23 pm
I recomment all firefox users to try to use opera for one week. Opera has built-in irc, mail, newsgroup, spam filter and many other things. And still it uses less memory and seems to work much faster.
Mark said,
Wrote on June 19, 2008 @ 3:26 pm
The lack of extensions in Opera is KEY to it's success, Extensions add bloat, slow things down, and add security issues.
The fact that Opera does 95% of what I want Firefox extensions to do, without the downsides, to me, means I hope Opera stay well clear of extensions.
Blair said,
Wrote on June 19, 2008 @ 10:25 pm
This is debate is like Intel -vs- AMD, nVidia -vs- ATI, or Mac -vs- Windows. There are fanboys on both sides, and nothing either side can say is probably going to influence the other.
I've tried really hard to like Opera. I even forced myself to use it as my default browser for a couple weeks. It does feel faster than other browsers. There are some nice features. I like the clean new interface in 9.5. I've just never felt comfortable using it. I think I've been using Firefox and IE too long. In my case, they probably missed the window of opportunity. Had it been free earlier, I may have grown more accustomed to it.
Firefox 3 on the other hand fits like a glove. It's comfortable, sleek and fast. The awesome bar is well... awesome. In my case the add-ons are what I couldn't give up. I'd be lost without Web Developer, Live HTTP header, and PicLens is pretty cool, especially with Smugmug. They've made add-ons easy to create. We use them in the forums to search malware databases, and will soon have one to post canned replies, without ever leaving the browser. I also like the ability to use color profiles. Try the Color Management plugin.
I really think we have an embarrassment of riches in browser applications. Firefox 3 and Opera 9.5 are both great browsers. Even IE 8 is pretty nice. To think a couple of years ago Microsoft didn't even have a team working on a browser. They thought all the work had been done with IE6.
Simon said,
Wrote on June 20, 2008 @ 4:14 am
Funny, the "Awesome Bar" was something that Mozilla copied from Opera, late in the FF3 development, so it's right there in Opera 9.5 already, just without the stupid name.
Infact, if you look, Opera has most of the good FF extensions, and misses out the crap.
AdBlock, yep, it's the Content Blocker, right click on a page, Block Content.
GreaseMonkey, yep, it's called UserJS, enable it in your Javascript options.
For a full list of buit in Opera functionality Vs FF Extensions, see here:
http://virtuelvis.com/archives/2005/01/opera-and-firefox-extensions
http://virtuelvis.com/archives/2005/09/opera-and-firefox-extensions-ii
It's not been updated to Opera 9.5 yet, so there are new goodies in 9.5, that eliminate the need for extensions further.
Larry said,
Wrote on June 20, 2008 @ 6:03 am
I find Opera 9.5 to be really impressive. I have been using it since the first builds were released and have never looked back. I use two different versions, Windows XP at work and Linux at home and love them both. You can read my own review at the link below.
http://myviewmytake.wordpress.com/2008/06/19/opera-95-my-browser-of-choice/
Jake said,
Wrote on June 20, 2008 @ 6:35 am
Hi,
I have tried both Opera 9.5 and FF3. I like Opera's user interface and design, but there are a couple of bugs/flaws that deter me from using it as my default browser.
Amongst others, I find the ad blocking a bit too cumbersome and the back button behaves a bit strangely in some cases (wrong section of previous page shown).
If these flaws will be fixed in the next major release, I will have a closer look at it again.
Cheers,
Jake
Samuel said,
Wrote on June 20, 2008 @ 6:46 am
I agree with what Blair said
EricJH said,
Wrote on June 20, 2008 @ 8:25 am
@Blair. Did you try Dragonfly? It is the developers tool of Opera and can be found under Tools --> Advanced -->Developer Tools.
It is still in Alpha though. Just give it a spin.More info here: http://www.opera.com/products/dragonfly/ and here: http://my.opera.com/dragonfly/blog/ .
One of my friends working in the field is very enthusiatic about it.
Hopefully this will make it easier for webdevs to adapt their web pages to Oprea as well.
Herbie_seky said,
Wrote on June 21, 2008 @ 5:37 am
HooRayyy....Opera WINS AGAIN!
Stephen said,
Wrote on June 21, 2008 @ 2:31 pm
This is more a question than a comment. Is Flock just a jazzed up version of Firefox??? I know they are both mozilla based, but I was just wondering if the new update to Flock would also have the same security enhancements that Firefox has.
sussie said,
Wrote on June 23, 2008 @ 9:52 am
@Jake: I find the block content easy and straight forward. You just click an item with your mouse and click "Done" (it's easily undone as well). You can even block specific ads for that one page only, without affecting similar items of the same server that you may wish to see.
christina said,
Wrote on June 23, 2008 @ 12:54 pm
I had sided with Opera until Firefox 3 came out. It is sufficiently fast- most of the things I like about Opera are satisfied with extensions. (I used to switch between Opera, Firefox, and IE on a daily basis... since Firefox 3, I only use Firefox)
Pros for Opera
Out of the box it is a better browser.
Slightly faster- but not significantly since Firefox 3
Integrated torrent and mail. (which is what I miss the most, I can't find any satisfactory extensions in Firefox for those)
other things that, for me, are satisfied by extensions in Firefox 3
Pros for Firefox 3
Extensions, extensions, extension (translation: options) Especially Stumble Upon (I love it and Opera won't get anything until release 10.0)
It works with those annoying "Firefox only" websites (yeah, there are work-a-rounds in Opera- but I always find them a pain)
Opens source (sure, Opera is customizable- but I like having more control)
If I were only using my own computer (my sister loves Firefox) I may have never tried Firefox 3- but since I did I love it.
francis said,
Wrote on June 23, 2008 @ 6:30 pm
through the years, im an opera user. i never doubt its performance and we're still on the race..
EricJH said,
Wrote on June 23, 2008 @ 6:45 pm
There is a stumble upon toolbar for Opera: http://www.operastumbler.com/ . As well as a widget.
For translations there are OSpell: http://opera.gt500.org/ospell/ and A spell: http://www.opera.com/support/tutorials/opera/spellcheck/ .
With questions about functionality just drop by at the My Opera forums. Opera is very customisable so whatever you may be looking may be possible.
Kyle Anderson said,
Wrote on June 25, 2008 @ 4:19 am
Ah, EricJH beat me to the Opera Stumbler plug
Which, by the way, is doing really well. It's currently serving over 30k websites daily to stumblers using Opera. Not bad for a browser that doesn't even have an official toolbar.
Oh, and Firefox vs Opera? Apples and oranges, baby. Apples and oranges. Might as well compare a roll cage to a Bentley.
Mike said,
Wrote on June 25, 2008 @ 10:46 am
Tried Opera for a month. Blocked Content vs AdBlock, no contest. AdBlock is much more intuitive and efficient. How many times I went to a web site, blocked the ad content in Opera just to come back later an do it again because they were pulling from a different ad server? Too many...
Memory usage? Who cares anymore? I've got 4Gb; 90Mb vs 120Mb... Whatever... I really saw no performance difference. Except constantly displayed an hour glass on sites heavy with Java...
EricJH said,
Wrote on June 25, 2008 @ 6:06 pm
Try a a ready made urlfilter: http://my.opera.com/Tamil/blog/ad-block and http://my.opera.com/mp3geek/blog/ .
It blocks; but that's about it.
J said,
Wrote on June 28, 2008 @ 4:57 pm
Opera is nice, but is not compatible with GOOGLE DOCS as FF3 is.
It's a bit of a shame. I would change to OPERA if it worked as fine in GOOGLE DOCS as FF3 DOes. In OPERA you can view your GOOGLE DOCS but up to now I didn't find how to edit them.
So, I stick to FF3 for the moment. (till I find or somebody finds a solution for this)
Martin said,
Wrote on June 29, 2008 @ 12:50 pm
Opera is and has been my main browser since around 2004 (yes i even payed for it, on both my desktop and my phone).
FF has really became the "Vista" of Web browser's it's fine if you wanna have to plug so much stuff in to get it to do what you want. If you want it to just do what it says on the tin then go Opera, out of the box Opera will outperform and out class any browser put against it.
Opera is by far the most innovative browser, it's not open source but it is very "Community" based (even as far as the Mac OS skin it has was designed by a forum's user and implemented).
Opera is much more strict on "Web Design" standard's and this does lead to it not coping very well with poorly coded or miscoded site's (unlike FF or IE).
Esteban said,
Wrote on June 29, 2008 @ 4:27 pm
well I dont know which one is the faster, to me seem pretty equal when is about speed. I use both and yeah i use too IE7 and Safari 3.
I try to not use only one, i try always to swich each time im navigate, but normally the ones which i most pick are Opera and Firefox
S Khandelwal said,
Wrote on July 4, 2008 @ 12:46 am
While opening firefox browser, a virus immediately close the browser and a message is flashed " Try some thing else, IE and Opera are not so bad .... by SAM" and i am not able to use firefox. Somebody helps me to sort the problem or virus
AbleTec said,
Wrote on July 8, 2008 @ 10:33 pm
Too bad Opra isn't accessible to the blind--it made such a big to-do in the beginning about how it wanted to help all "handicapped" but really lacks in the area of sight-impairment to the point of not being useable. Firefox therefore it is.
Skippy said,
Wrote on July 15, 2008 @ 4:35 pm
Lacking in the area of sight impairment? Hit the plus on your numberpad. Now hit the minus for a while. Now hit your star. Head into your appearance menu, and in the first tab, change your icon size percentage. Now take into account that this is a very old addition.
What were you saying?
anonymous said,
Wrote on July 17, 2008 @ 7:26 am
Not to count the User Mode with the high contrast options or the screen reader features. Opera is by far the most accesible browser, but most of those features are hidden in the menus to reduce clutter.
Just drag the View button (in the Browser View category) to the right of the search bar like in previous versions, or in the same place drag the features you want to any toolbar. Or use keyboard shortcuts. Or a weird mouse gesture, the choice is yours.
Rich said,
Wrote on July 17, 2008 @ 9:40 am
Saw this article on Digg, but it was on another site - they have just copied and pasted your article!
http://www.xptricks.net/xp/tutorials/2008/07/firefox-3-vs-opera-95/
Bastards or what!
EricJH said,
Wrote on July 17, 2008 @ 9:45 am
At the bottom of the article it says it was originally from Geeks to Go.
jim said,
Wrote on July 23, 2008 @ 11:29 am
I downloaded firefox about 2 weeks ago to replace IE as my main browser. I noticed a massive difference in speed and the webpages seemed to run smoother somehow.
Then about 2 days ago I downloaded Opera 9.5 and it just mopped the floor with the fox. I'm never using the fox again, this new Opera has swayed me.
Ajith K Punnoose said,
Wrote on July 24, 2008 @ 6:23 am
Please add the features of opera such as inbuilt Mouse gestures, mail and RSS client, Chat client... then the ultimate customize ability etc..
I think many of the new users are actually scared by Opera and then they won't come back. I have seen the look on many a peoples face when I opened opera.
Stephen Turrell said,
Wrote on July 25, 2008 @ 7:23 am
Opera is my choice it's always been faster & more secure & it still has the edge.
Opera is easy to customise i have 30 tabs in speedial by adding a couple of lines to the speedial.ini & you don't need an extension to slow you down.
Opera is a smaller download than FireFox & if you add 50 plus extensions to FF & an email client like Thunderbird to give it the same functionality as the bare install of opera
FF gets slower.
Glad to see FireFox caching up keeps the development team at Opera on their toes.
EricJH said,
Wrote on July 25, 2008 @ 8:36 am
Make that at least 150 extensions: http://files.myopera.com/Rijk/blog/extensions.html?1216992875 .
Wondering what would be happening if FF with those 150 extensions would be benched together with Opera. Noboday never has done such a thing. We all can guess what will happen....
zaq said,
Wrote on July 27, 2008 @ 9:19 am
firefox is best in page loading,java script,page saving more fast than any other browser.
see these fourms.....
1.http://dotnetperls.com/Content/Browser-Memory.aspx
2.http://webdesign.about.com/gi/pages/poll.htm?linkback=http://webdesign.about.com/b/a/255676.htm&poll_id=2506010762
3.
Zimmster said,
Wrote on July 29, 2008 @ 8:58 am
The thing about the Firefox is that it has a better and more agressive marketing plan. Where ever you look you will se a banner :"Please try Firefox" . Opera doesn't have banners everywere. Opera has STYLE. And Most Of All it has almost all the tools you need in a web browser. No need to loose yourself trough thousants of extensions from wich most are pointless . Some are good, some are gtreat , but the better ones are already implemented by default in Opera and may i say even MONTHS before a firefox extension is created to compensate for a opera function. Firefox is a very good browser but i belive Opera is better.
!!! The problem of the future might be Microsoft. Microsoft has the tendency to buy the competition one way or another. One day we might find ourselfs to using Firefox or Opera -"Powered by Microsoft Corporation" . Don't forget that Bill steps down and Ballmer steps IN. The guy who said that all the other software companies are crap and that Linux and the Open Source Community are a Cancer. Things will change . And Not All For The Best
Keeper said,
Wrote on August 29, 2008 @ 10:31 am
I doubt microsoft would be able to buy firefox off the competition since firefox is open source but you might be right about opera
Jay said,
Wrote on September 1, 2008 @ 7:14 pm
I've just Opera for many years as my main browser, and now as my backup. Granted the add-ons do slow down Firefox to a point,however the productivity I get out of it is just to valuable to me. Of course if I want Firefox faster, I just remove the add-ons. Point is that I control the flexablity.
roc said,
Wrote on September 5, 2008 @ 11:57 am
I have, for obvious reasons, happily used Opera almost exclusively for years. A very few sites do not support Opera, for which I use Firefox. Opera is the Best!
demon child said,
Wrote on September 5, 2008 @ 11:30 pm
Someday, FF will copy ALL Opera's features:
Tabbed browsing,zoom,etc...who's first.
First time when I tried firefox 2,I said:oh,a tabbed,skinnable browser.And the zoom:crap.It's simply text enlargement.
And when I tried FF3, I simply said:oh,so they implement the zoom too?And several other features being copied from Opera.
Offline mode?Even FF3 still sucks.
Just wait when will Moz implement the mouse gesture,identify as,speed dial,etc,etc,etc(long list of opera features here)...and call itself Copyfox
demon child said,
Wrote on September 5, 2008 @ 11:44 pm
Oh,I just noticed that FF3 is still unable to save page as MHT...what Mozilla has been doing during the almost two years between Firefox 2 and 3? As the noticeable new features are just zoom, donwload manager, and awesomebar
Sujal said,
Wrote on September 7, 2008 @ 3:22 am
I have been using Opera as the only browser since it released version 6. I have found that FF2 and FF3 have sopied many features that buitin in opera. Opera has also copied some features like "alt+T" to open new tab which was previously "alt+W", but at that time, tabbed browsing was not that famous. Also opera has copied some FF features like "adding a close button to all tabs". But Except small adaptations, opera has built the browsr on ts own.
There is a long list of usefull builtin features like
1. Fit to The Page: it is very helpful while reading articles and in most cases eleminates horizontal scrolling.
2. M2 built in mail client: Also it does not support outgoing HTML, still it has many useful features like tagging mails like "valuable", "important", etc. It alo has a gmail like interface in which mails are sorted into contacts, labels, threads, attachments, etc in to a pleasing manner.
3. Recoverable pop-ups and tabs: i find this very useful incase you hav accidenly closed any tab. This is an exclusive opera feature.
4. Toggle bewteen images on, cached images or no images. This was useful in times when i had dialup connection. I find it useful today also.
5. there are a lot of other features like quick preferences, notepad nad the toggle on and off side panel, etc. I have added "compose mail" icon next to search bar and it helps me a lot. Note pad is useful when i want to type the info or address, when some sites have adresses in flash or as images. with the help of notepad, i need not toggle between the windowsof opera and winword/wordpad/notepad (of windows).
FF3 is good, but it has copied many features which were in opera long back.
Opera was and is definately overlooked and i had found that many comparisions made between browsers had lower version of opera compared with the most recent versions of other browsers. Even when opera 7 was released, opera 6 was compared with other browsers even after 2 months of release of opera 7. Same thing happened when opera 8.5 was released and surprisingly, opera beat FF and IE in many tests.
Even if opera is highly loaded with features and built in add-ons nad a mail client, still opera uses less memory than FF3. IE sucks.IE is there bcos its a microsoft product and we know how microsoft works as said by Zimmster (Wrote on July 29, 2008 @ 8:58 am)
I am an opera addict and for me opera is still my main browser. I use FF3 and IE7 only when some sites do not open well in opera, generally due to the fact that opera strickly uses the html and other web standards.
EVOLUTION said,
Wrote on September 8, 2008 @ 12:37 am
opera is the best!!!!!!!!!!!! way faster than firefox and will continue to leave FIREFAG behind!!!!! the widgets are way better in opera than firefox,
in a memory test i ran firefox ran up too 57k in memory but opera the highest i ever seen is 23k!! and in the lowest 6k!!!
OPERA is under rated and under appriciated!!!!
Its faster and safer and FIREFOX is becoming IE why?
because people only say its good because they never tried anything eals and it popularity JUST LIKE IE!!!
OPERA OPENS IN A MILLA SECOND FIRE FOX TAKES TO LONG !!!!
OPERA WINS NO DOUBT
Sujal said,
Wrote on September 8, 2008 @ 5:04 am
i have also observed that when opera is minimised, the memory usage reduces, which is not the case with firefox.
Also is fast in both hot start and cold start
Cold Start: first time when a browser starts aftr the operating system loads
Hot Start: 2nd time the browser starts (restarts). This is more faster than the first start.