Дополнения

MinimizeToTray revived от Nils Maier

Minimizes windows into the system tray.

Element Hiding Helper для Adblock Plus от Felix Dahlke

Избавься от текстовой рекламы! Element Hiding Helper расширяет возможности Adblock Plus, упрощая создание правил для скрытия элементов.

Mozilla Archive Format, with MHT and Faithful Save от Christopher Ottley, Paolo Amadini

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Key config от Martin Petricek

This add-on provides configurable keyboard shortcuts for several actions and a dialog to customize them.
All shortcuts can be redefined in Tools -> Key settings

Примечание подборщика Not to be confused with keyconfig, that one allows adding new keys.

Paste to Tab and Go от Zulkarnain K.

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.

Примечание подборщика Use this old Paste and Go extension instead for customizable shortcut key: http://pasteandgo2.mozdev.org/ or use Tab Utilities for similar shortcut function, but uncustomizable.