Ever been annoyed by all those ads and banners on the internet that often take longer to download than everything else on the page? Install Adblock Plus now and get rid of them. Right-click on a banner and choose “Adblock” from the context menu — the banner won’t be downloaded again. Or open Adblock Plus sidebar to see all elements of the page and block the banners. You can use filters with wildcards or even regular expressions to block complete banner factories.
All-in-One Sidebar (AiOS)is a sidebar control, inspired by Opera's. Click on the left edge of your browser window to open the sidebar and get easy access to all your panels. It lets you quickly switch between sidebar panels, view dialog windows such as downloads, extensions, and more in the sidAiOS screenshotebar, or view source or websites in the sidebar. It includes a slide-out button and a toolbar, all of which can be extensively customized.
FlashGot is a free Mozilla/Firefox/Flock/Thunderbird extension (compatible with Netscape too), meant to handle single and massive ("all" and "selection") downloads with several external Download Managers.
NoScript provides extra protection for your Mozilla/Firefox or Flock browser: this extension allows JavaScript and Java execution only for trusted domains of your choice .
ScrapBook is a Firefox extension, which helps you to save Web pages and manage the collection. Key features are lightness, speed, accuracy and multi-language support. Major features are:
Save Web page
Save snippet of Web page
Save Web site (In-depth Capture)
Organize the collection in the same way as Bookmarks
Highlighter, Eraser and various page editing features
More tweaks added to tabs. Ability to select and open muliple links in tabs, open link in a duplicated tab, merge tabs and close tabs from similar domain, Save Sessions, Recover Closed Windows,Added Crash Recovery