Web of Trust, MyWOT/WOT: Website Reputation Rating Requires Restart
Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs so you can decide whether to visit a site:
• Green – The site is trusted
• Yellow – Be cautious
• Red – Online threats detected
Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...
This extension prevents Google and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.
AutoPager Requires Restart
AutoPager automatically loads next pages when you reach the end of a page. It works on a ton of sites,Google,Yahoo..
It works well with most other add-ons adblock plus, WOT and most of the greasemonkey scripts.
You can also try AutoPagerLite.
SmoothWheel Requires Restart
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
QuickDrag Requires Restart
Extends the function of the drag-and-drop mouse gesture so that it can be used to load URLs, do a web search of selected text on a page, or save an image on a page. The successor to Super DragAndGo.
googlebar Requires Restart
The original (though unofficial) Google toolbar for Firefox, with an emphasis on easy access to many types of specialized searches.
WikiLook Requires Restart
Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia.
Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus.
70+ languages supported!
lolifox - Fierr MOD Requires Restart
Replaces the error page with a lolifox appearance with additional features.
Live HTTP Headers (Fixed By ITWorld.com.pk) Requires Restart
View HTTP headers of a page and while browsing.
Live HTTP Header Fix By Danyial ITs Working On Firefox Again Fixed Reply Problem
Multi Web Search Requires Restart
For those who are looking for and want to find!
Find the most relevant information from the Web with a single request to different search engines and get the results on a single page
Whois & Flags Firefox & Websites Popularity Rating Requires Restart
Display Country Flag indicating Website Physical Location (Country, State, City). Website Popularity (Live Visitor Statistics). Shows how many users are visiting any World Website per day. Website IP IPv6 Addresses, DNS, Hosting. IP Whois Lookup
SD Tools Requires Restart
Sharedir.com tools for working with mediafire, rapidgator, 4shared links and links from other popular file sharing sites via right-click or Tools menu.
Extract links / test selected links / convert links to 'direct download' links, and much more.
Paste to Tab and Go Requires Restart
Paste URL or text to any tabs or a new tab and load it immediately, like 'Paste & Go' feature, but unlike 'Paste & Go', this extension will paste text from clipboard to a tab without focusing on the tab first.
mid Requires Restart
More than 2000 dictionaries in 270 Kilobyte! Search multiple dictionaries at once!
WikiSearch Requires Restart
Search Wikipedia through the context menu.
Advanced Dork: Requires Restart
Advanced Dork: gives quick access to Google's Advanced Operators directly from the context menu...
ConQuery Requires Restart
Context searching for everyone and URL manipulation tool for advanced users...
RSE Tools Requires Restart
Tools for working with rapidshare and links from other popular file hosting and sharing services.
Features: get rapidshare links from a page, test selected rapidshare links, search rapidshare files for selected terms, etc.