(I'll keep this post updated with stuff as I find it) Some other posts have touched on this: https://connect.mozilla.org/t5/ideas/transparent-context-menus/idi-p/8002 https://connect.mozilla.org/t5/ideas/give-to-context-menu-same-design-as-menus/idi-p/7318 Having a look at Firefox Color (create a custom theme) which looks great! However it would be even better if we could: Theme the right click (context menu) Theme the "menu hover"/mouseover colour (unless I missed something?) Include the custom background on the main menu/context menu Make themes easier to discover. May sound dumb, but in Edge/Chrome, you can find Themes in Settings, but in Firefox it's not as intuitive (even though I have themes installed): Allow the theme background image to show on the new tab page, like Chrome: Let us set a custom font (in a theme) please! Allow themes to change message boxes: And things like the blue tick box/buttons/background in Settings Also the PDF viewer Menus I think themes are underrated on FIrefox, they're already more flexible and customisable than Chrome/Edge. Keep up the good work!
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