2. business software
  3. news
  4. reviews
  5. top apps
Download Firefox 17.0

Mozilla Firefox for PC Windows 17.0

By Mozilla Organization  (Open Source)
User Rating

Managing Browser Add-Ons In Mozilla Firefox

Mozilla Firefox is a fast, light and tidy open source web browser. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. The browser is particularly popular with developers thanks to its open source development and active community of advanced users.

Easier Browsing

Mozilla put of a lot of resources into creating a simple but effective UI aimed at making browsing quicker and easier. They created the tab structure that has been adopted by most other browsers. In recent years Mozilla has also focused on maximizing browsing area by simplifying toolbar controls to just a Mozilla Firefox button (which contains settings and options) and back/forward buttons. The URL box features direct Google searching as well as an auto predict/history feature called Awesome Bar. On the right side of the URL box there are bookmarking, history and refresh buttons. To the right of the URL box is a search box which allows you to customize your search engine options. Outside of that a view button controls what you see below the URL. Next to that you have the download history and home buttons.


Mozilla Firefox boasts impressive page load speeds thanks to the excellent JagerMonkey JavaScript engine. Start up speed and graphics rendering are also among the quickest in the market. Mozilla Firefox manages complex video and web content using layer-based Direct2D and Driect3D graphics systems. Crash protection ensures only the plugin causing the issue stops working, not the rest of the content being browsed. Reloading the page restarts any affected plugins. The tab system and Awesome Bar have been streamlined to launch/get results very quickly too.


Mozilla Firefox was the first browser to introduce a private browsing feature which allows you to use the internet more anonymously and securely. History, searches, passwords, downloads, cookies and cached content are all removed on shutdown. Minimizing the chances of another user stealing your identity or finding confidential information. Content security, anti-phishing technology and antivirus/antimalware integration ensures your browsing experience is as safe as possible.

Personalisation & Development

One of the best features of the Mozilla Firefox UI is customization. Simply right click on the navigation toolbar to customize individual components or just drag and drop items you want to move around. The inbuilt Mozilla Firefox Add-ons Manager allows you to discover and install add-ons within the browser as well as view ratings, recommendations and descriptions. Read more about the top recommended add-ons for Mozilla Firefox. Thousands of customizable themes allow you to customize the look and feel of your browser. Site authors and developers can create advanced content and applications using Mozilla’s open source platform and enhanced API.

Looking for the Mac version of Mozilla Firefox? Download Here

Looking for the 64-bit version of Mozilla Firefox? Download Here

Check out our guide to alternative browsers if you're looking for something a little different.

Please note: from version 53.0 onward Windows XP and Vista are no longer supported.

Title: Firefox 17.0
Filename: Firefox Setup 17.0.exe
File size: 18.56MB (19,457,712 bytes)
Requirements: Windows 2000 / XP / Vista / Windows 7 / XP 64-bit / Vista 64-bit / Windows 7 64-bit / Windows 8 / Windows 8 64-bit / Windows 10 / Windows 10 64-bit
Languages: Multiple languages
License: Open Source
Date added: November 21, 2012
Author: Mozilla Organization
MD5 Checksum: 0F4957FD0E56DA4C5FEDBD6707DB5601

# 新機能
- Facebook メッセンジャーをソーシャルプロバイダとしてサポートする、Social API 最初のバージョンが実装されました。
- 脆弱性の知られているプラグインに対しては Click to Play 機能が有効になり、ユーザがクリックするまで読み込まれなくなります。
# 変更
- 表示されるアイコンを大きくしロケーションバーの使い勝手を改善しました。
- Mac OS X 10.5 の サポートを終了しました。
# 開発者
- JavaScript の Maps と Sets がイテラブル (反復可能なオブジェクト) として利用できるようなりました。
- SVG の FillPaint と StrokePaint を実装しました。
- Webコンソール、デバッガおよび開発者用ツールバーを手早く簡単に使えるよう改善しました。
- ページインスペクタの、マークアップパネルを刷新し、DOM を簡単に編集できるようになりました。
- iframe の sandbox 属性をサポートしました。これはセキュリティ向上に役立ちます。
# 修正
- 新規タブページの修正などを含む、20 以上のパフォーマンスの向上を行いました。
- ポインタロックが Web アプリで動作しない問題を修正しました。
- 固定ヘッダのあるサイト上でのページスクロール量を調整しました。