Lately Firefox has not been restoring my colors when I restart, until I revisit color.firefox.com in a new tab.

It is mind blowing that your theme doesn't sync.

No way to change new tab page colour from white - Overrides dark theme and userContent.ccs so no workaround.

Awesome experience!

Nice :D

Really nice when I have an existing theme I want to edit but could we please get the option to change the colour of the new tab background.

After exporting, the add-in does not have the correct structure. The XPI file contains only two files: "manifest.json" and "0.png". The exported theme has an incorrect design and cannot be installed.

I made a Windows XP theme in less than 10 minutes.