I imagine this shouldn't be too hard to implement. Would be nice to have without having to install an extra addon or edit the CSS.
Please add a that user can set their own wallpaper from gallery or from any other source to set as home screen wallpaper.
(Note: a similar idea has been merged into this thread)
Add the ability to set the background of a new tab
I recently switched from opera GX to Firefox and I noticed you cannot change your background like you can on chrome or opera GX , this makes the background boring even with color.
I think we should be allowed to change our background to not just a solid color but a picture so it makes the site prettier and more personal to the user.
Back with an update...
This idea has been reviewed by our product team and we want to explore it more—this means that we're looking into personalization features as part of our New Tab roadmap this year.
Related idea here: New Tab/home page improvements
Feel free to continue the conversation here in the comments and stay tuned for updates.
-The Community Team