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Wordpress Plugins 
Mozilla Firefox Addons 
Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey
Dig through URLs with mouse right button click (context-menu).
Location bar button, Toolbar button
This is Restartless Build of previous version. Toolbar button added.
Dig through URLs with mouse right button click (context-menu).
Parses the URL and displays a dialog with parsed couples, allowing the user to change variables or path and open the newly compiled url in current/new tab.
Multi Links Plus lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.
Right Click to show Bookmarks Menu.
Single Star Button without separate Bookmarks Menu Button.
Remove Bookmarks Menu Button. Leaves same Single Star Button.
A Dragon Go Server extension. Regularly checks for new moves on DGS, showing a system notification, and maintaining a context menu of game links.
Translate selected word or phrase over translate.yandex.ru from any lang to Russian (or from Russian to English) - result in context menu (right click) and in popup. Minimum and fast. Not affect DOM. Unofficial extension - works by using API.
No misnomer here, this Firefox extension allows you to copy the URL of a detected RSS or Atom XML feed to the clipboard, making it uber-easy to subscribe in other applications (such as Thunderbird). You probably know that Firefox doesn't provide an easy way to access the URL.
CopyFeedLocation gives you three easy ways to access a feed URL... an optional toolbar button, a right-click menu option for the standard Feed Button (subscription icon), and a Firefox context menu item. Each is flexible to handle one or multiple detected feeds on a given website, so you can quickly get the feed you want and move on.
Context menu options for easy access to cookie permissions. For those who have ask for cookie button functionality in the context...
Copy multiple urls (links) to clipboard. Provides options to copy urls of all opened tabs and urls in selected text. You can customize the format of copied urls. You can also open multiple links from clipboard.
Adds a context menu to Firefox's cookie manager and permissions dialogs.
