1. Mozilla Firefox is a well-known web browser. Its most acclaimed characteristics are stability, safety, usability and speed. Fortunately, there is a wide community of users and developers that contribute to its constant development. Likewise, it supports installing add-ons to add new features to it.
2. Install Firefox Extended Support Release. Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations such as universities and businesses. Firefox ESR does not come with the latest features, but it does have the latest security and stability fixes.

Three years have passed since the release of Firefox 3, three years of conquer, placing Mozilla's web browser as the second most widely used browser. With approximately 30% of worldwide usage, Firefox follows the all time winner Internet Explorer. The release of Firefox 4 marks the end of a successful era, and the beginning of a new war against its major competitor Internet Explorer 9. Probably as a response to last week's major release from Microsoft, Mozilla decided to reveal faster than expected its new web browser. Therefore Firefox 4 is now available for download and ready to be used by user's worldwide.

Index of /pub/firefox/releases/ Type Name Size Last Modified; Dir. Dir: 0.10.1/ Dir: 0.10/ Dir: 0.10rc/ Dir: 0.8/ Dir: 0.9.1/. Mozilla Firefox 4.0.1: Schneller und sicherer Download, Sofort, Kostenlos und Werbefrei bei soft-ware.net. Dein Download Portal.

Based on the Gecko 2.0 engine, Firefox 4 comes with many inside changes and new additions. Most important, the new version includes support for HTML5, and CSS3, graphics acceleration with Direct2D and Direct3D on Windows, XRender on Linux and OpenGL on Mac, a new Javascript engine (JaegerMonkey) and a better cross platform component model that supports multiple language bindings. A remarkable job has been done for the Add-on Manager, that stands out now as a separate module with its unique window. From here you can easily stay in touch with the community's new add-ons, but you can also download, install or remove any extensions to the browser. On the downside the download manager has been unaltered and stays identical to the one from Firefox 3.
For a better user-friendly experience, version 4 comes with a revamped interface significantly improved that features a “touchy” character compared to the one present in IE 9. Probably this feeling is the result of a minimalist approach used by Mozilla team to re-design the interface but also because Firefox 4 supports now multi-touch displays. At a first glance you will realize that the browser lacks of any toolbar, all the major command buttons being re-allocated in a single-button menu component. All the tabs have been moved on top of the address bar, making the browsing experience much easier. But the overall design concept looks almost identical to the one present in Opera 11. The only difference is the group tab manager from where you can arrange in any order the opened web-pages by just drag'n'drop them and even save any group of tabs for further usage.
Mozilla improved even further the mobility aspect of their browser and included the Firefox Sync option that allows the user to save and re-use his own settings, passwords, bookmarks, history, open tabs, across other PC's or mobile devices. You just have to create an account on the Firefox Sync official server, choose the settings you want to be synchronized and add the device you want. Another important addition is the Web Console (very similar to what Firebug was for version 2 and 3), from where you can peek into the code of dynamic web pages.
The browsing speed in Firefox 4 is significantly increased, and this can be seen while scrolling complex web pages. Similar to IE 9, with Firefox 4 you can now experience uninterrupted browsing. In case plugins such as Adobe Flash, Apple Quicktime or Microsoft Silverlight will crash on a web page, this will no longer affect the entire browser activity. You can further browse web pages, while you have others opened and completely crashed. If you want to re-establish the connection on a crashed web-page just refresh the page. In case you want to browse on another person's computer and you don't want to leave traces of your web activity, you can start a Private Browsing session. In this way, Firefox will not record the history of your present activity.
Version 4 provides improved security while browsing thanks to HSTS support (HTTPS Strict Transport Security), through which a web-page can request the browser to access its content through HTTPS protocol. In this way any attackers have no access to any important data that might leak while browsing insecure.
Firefox 4 relies heavy on memory resources as previous versions and in time it might become overwhelming for weaker PC systems. Also sometimes it stutters while loading for the first time a web-page with no reason. But I guess this is the price Firefox 4 has to pay being at the moment the most comprehensive browser on the market.
Pluses: faster than previous versions especially on complex web-pages, support for HTML5, and CSS3, fast graphics acceleration, crash protection, OpenType font features, support for WebGL, multi-touch support, Firefox Sync option;
Drawbacks/flaws: heavy on resources, some stuttering loading times while opening for the first time a web-page, no changes in the download manager, interface design based on Opera 11;
In conclusion: With Firefox 4, the Mozilla team has achieved its goal in creating the most comprehensive browser on the market without losing its open-source character.
version reviewed: 4.0

• 1Firefox 4 Desktop Launch Schedule
  • 1.6Tuesday, March 22

• Bookmark this page for the latest updates on timing

Thursday, March 17

• 11:30 am PDT - Triage to make sure there are no late-breaking issues
• Rebuild for RC2
• Watch crash-stats and input.mozilla.com
• QA web content (mozilla.com) on stage
• QA test RC2 Build 2

Friday, March 18

• Rebuild for RC2 build 3
• Continue to QA test RC2 build 2 (testing can be carried over)
• 11:30 am PDT - Triage to make sure there are no late-breaking issues
• spot-check RC2 build 3
• Watch crash-stats and input.mozilla.com
• QA Sign-off
• push RC2 build 3 to mirrors
• push RC2 build 3 to beta channel users
• Notify IT of intent to seed mirrors

Saturday, March 19

• Watch crash-stats and input.mozilla.com

Sunday, March 20

• wait for release-drivers 'go for seeding launch' from beltzner
• Evening PDT - Push final release directory to mirrors
• +2 hours - Updates on releasetest for QA to test

Monday, March 21

• 11:30 am PDT - Triage to make sure there are no late-breaking issues
• 12:00PM PDT - Final call on 'Go launch' (Beltzner)
• 4:00 pm PDT - Push microsite pages live and test
• All day Watch crash-stats and input.mozilla.com

Tuesday, March 22

War Room Mountain View

• MoCo employees working on the launch will be in 10Forward* - Everyone Welcome! Let us know if you will be in the MTV office for the early-morning launch activities so we can plan accordingly
• People will start showing up at 5:30 am PDT
• IRC backchannel will be #firefox4 on irc.mozilla.org
• The war room will be streamed live on Air Mozilla. Suggest speakers here.
• There will be food, activities and a whole lot of awesomeness starting at 6:00AM:
  • 6:00am Breakfast in Ten Forward
  • 6:00am Air Mozilla broadcast starts
  • 12:00pm Firefox 4 Launch Lunch in R2D2/CP3O
  • 4:00pm Launch Cantina, don't forget to invite your Friends and Family
  • Throughout the day we'll have celebrations for download milestones and coverage. Examples: Banner unveiling on Castro Street, cake cutting, champagne, and more surprises...
• *Note: Each office will be organizing their own War Room and activities and we will all be linked together on video

Launch Day Timeline

• 6:00 am PDT - Push mozilla.com pages and update product details to point the download links ~20 min
• Flush the web caches~10 min
• Check the live pages ~20 min
• Push manual / 'Check For Updates' update on release channel for 3.6 users ~10 min
• Push manual / 'Check For Updates' update on release channel for 3.5 users ~10 min

Mozilla Firefox 4.0

• Official Launch - Make announcement
• Push campaigns, promos, wall posts, newsletter, blogs, tweets, community note, etc.
• QA validate manual updates ~2 hours

Firefox 4.0 Exploit

Wednesday, March 23

• Get ready for the Firefox 4 for Mobile launch!
• Continue to provide support on SUMO
• Watch crash-stats and input.mozilla.com

Firefox 4.0 Install