Adds extension options dialogs to the Tools and/or Titlebar menu. Includes toolbar icon - left-click on icon opens extension options menu, right-click opens Add-ons manager. Version 1.22 adds a hidden pref - extensions.ExtensionOptionsMenu.ShowAll. Go to about:config and set to 'true' to show all extensions in menus even if they don't have options dialogs. They will show up as a disabled menu entry.
https://addons.mozilla.org/en-US/firefox/addon/extension-options-menu/
Themes Menu
Adds a menu to the Tools and/or Titlebar menu to select theme. Includes toolbar icon - left-click on icon opens themes menu, right-click opens Add-ons manager.
https://addons.mozilla.org/en-US/firefox/addon/themes-menu/
Addon Update Checker
I didn't like Firefox updating my add-ons without my knowledge, so I turned off add-on updates, but I still wanted to be notified of new versions. So I wrote this extension. Things to know: if you change options while in the checking or found update states, the icon will be grey until the next check/restart. It does not know anything about the built in Add-on version checker. In other words, Firefox may check for updates and find one, but the icon for this add-on won't change until the next time the add-on checks. This add-on sets "extensions.update.autoUpdateDefault" to false. Otherwise is won't show the add-ons that can be updated - and breaks. If you uninstall this add-on and want to change it back, you can get to the pref from about:config, or on the Add-ons Manager click the gear dropdown near the search box. Select "Update Add-ons Automatically" to change to Firefox default.
https://addons.mozilla.org/en-US/firefox/addon/addon-update-checker/
Sidebar Auto Show/Hide
This is as a working version of the part of Optimoz Tweaks that I used. The sidebar auto open and close when the mouse touches the left side of the browser window. I rewrote the preference page to be inline and the way the preferences are read/written by the extension. I removed 'eval's and 'setTimeout's that generally aren't allowed in extensions for security reasons. I wrapped the everything in the extension in a variable and rewrote the way many functions are called (so they could be wrapped.) I eliminated several functions that were only called once or twice and were only one or two lines long. Replaces all 'var's with 'let's. I fixed the hand icon that can hold the sidebar open regardless of mouse position. Probably more too, but that's all I can remember. This extension does constantly check mouse position which can theoretically be a performance hit. I've never even seen 1% CPU usage when moving the mouse though.
https://addons.mozilla.org/en-US/firefox/addon/sidebar-auto-showhide/
Hide Tab Bar With One Tab
Hide the tab bar if there is only one tab.
https://addons.mozilla.org/en-US/firefox/addon/hide-tab-bar-with-one-tab/
Toggle Link Visited Status
Adds a right-click menu item to either mark a link visited or unvisited depending on its current state using the async history service needed by Firefox 23 and above.
https://addons.mozilla.org/en-US/firefox/addon/toggle-link-visited/
Removed. Not e10s compatible. I don't use it. Too much work to fix.