The recommended way to install user styles is to use Firefox with Stylish.
If you already have Firefox with Stylish, make sure this site is allowed to run JavaScript.
You've installed this user style in Stylish. To uninstall it, open the Tools menu, choose Add-ons, click the User Styles panel on the top, click on the entry for this user style, and click Uninstall.
You've installed this user style in Stylish. To uninstall it, open the Tools menu, choose Stylish, and remove the entry from there.
You've installed this user style in Stylish. To uninstall it, click the wrench icon, Extensions, click Options beside the entry for Stylish, and click delete for the appropriate entry.
You've installed this user style in Stylish, but a newer version is available.
To uninstall this user style, open the Tools menu, choose Add-ons, click the User Styles panel on the top, click on the entry for this user style, and click Uninstall.
The recommended way to install this user style is to .
This style attempts to replace Gmail standard (i.e. ugly-looking) toolbar icons with ones from the Tango project (http://tango.freedesktop.org/). This style is being constructed now, so any feedback will be appreciated.
For now, all visible icons seem to be replaced. I couldn't figure out (yet) how to replace stars in the message list. Stars in the conversation view are replaced.