Thunderbird Visuals Overhaul — Outlook-style theme + custom sender avatar addon
I wasn't a fan of Thunderbird's default look so I built a visual overhaul to make it feel more modern and closer to Outlook.
What's included:
- Custom CSS theme with a wallpaper background, cleaner folder pane, and better email card layout
- Colour-coded sender initial circles (like Outlook/Gmail) — built as a custom WebExtension addon
- Also added a couple lines of code into a .js file to get rid of the "Welcome to Thunderbird" screen
Let me know what you'd change or add!
EDIT: I fixed a few bugs and visual glitches so it should look a lot better. I also made an addon that replaces the favourite star on the email list to a recycle bin to move messages to the trash, that is optional.
The wallpaper is customisable by replacing putting whatever image (I recommend 4K) inside the chrome folder and calling it exactly "wallpaper.jpg"
Latest Screenshot: https://ibb.co/fwf2csZ
I will make a few more changes and then will upload it all to Github so you can all download it if you want.
EDIT #2: Seeing all the interest, I focused on a couple fixes and I have uploaded it to Github with instructions so you can all use it. Let me know either here, or on the Github itself of any bugs or issues or improvements. Also feel free to ask if you need any help installing it.