Displays a real-time thumbnail preview when hovering mouse on a tab.

TabPreview.uc.js

Adds a vertical toolbar.
To customize the toolbar (displaying mode / size of icons / add or remove items), modify the script directly.

VerticalToolbar.uc.js

A lightweight customizable mouse gestures. To customize the gesture mappings, modify _performAction property in the script as you like.

MouseGestures.uc.js (The simplest version.)

MouseGestures2.uc.js (with Wheel Gestures and Rocker Gestures. It's buggy.)

zeniko's Mouse Gestures (Displays function names, supports wildcard and gesture timeout.)

Adds 'Paste and Go' menu to the right-click menu in Location bar.

PasteAndGo.uc.js

Enables to copy title and URL from the right-click menu of tabs.

CopyTabInfo.uc.js

Clears the term in the search bar and reset the engine after searching.

ClearSearchTerm.uc.js

Scrolling mouse wheel on 'Search <engine> for <selection>' menu to change the engine. Additionally, middle-click the menu to search.
Does not work if you don't place the search bar.

ScrollSearchEngines.uc.js

Middle-click the search engine button or popup to search clipboard text.

SearchClipboard.uc.js

Enables to duplicate tab from right-click menu of a tab.
In Firefox 3, we can duplicate tab with the session state.

DuplicateTabMenu.uc.js

Adds 'Open Folder' menu to Add-on Manager.
Requires userChrome.js 0.8 + Sub-Script / Overlay Loader.
Works only with Windows.

OpenAddonFolder.uc.js

Confirms before deleting or sorting bookmarks.
Requires userChrome.js 0.8 + Sub-Script / Overlay Loader.
Does not work with Firefox 3.

BookmarksConfirmation.uc.js

Adds 'Show Cookies', 'Show Passwords' and 'View Certificates' menus under 'Tools' menu.

PrivateToolMenus.uc.js

Adds menu and shortcut key to restart Firefox.

RestartFirefox.uc.js

Makes the tabs colorful.
Does not work with Firefox 3.

ColorfulTabs.uc.js

Change the position whereto move a tab by drag-and-drop half step ahead.

MoveTabHalfStepAhead.uc.js