Close other tabs by double-clicking the one you want to keep
Press ctrl+shift+K (or) double-click to see its meaning. This extension is ideal for those who doesn't like to switch their window to see the meaning of a word. ...
Double-click on tab to reload tab (Press SHIFT key to skip cache). Compatible with Firefox 2.* - 31.*
Double-click action for Firefox -
double-click Link, Bookmark/History to open in new tab (emulate ctrl+click).
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Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co
Removes all the junk from New Google Reader and just gives you the search and collapsable subscriptions + favicons. By DemianGod
Also you can install the Script for GreaseMonkey.
Download from: http://userscripts.org/scripts/show/30242
Define your own shortcuts to move the tabs into firefox.
You can move the tabs along the tab bar and at both ends.