Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
For those who use the popular extension "All-In-One Sidebar", I have created a custom graphic for the background on the vertical toolbar, and changed some coding so it uses the new graphic instead of the regular toolbar graphic.
Lightened the background in the add-ons box to improve readability.
I made a new cool graphic for the background behind the tabs when using tabbed browsing.
I polished the CSS coding to remove redundancies or minor errors.