Thunderbird 115 introduced a new look. I hate it. Not only does it no longer fit in with KDE Plasma, it lost functionality due to it’s new integrated search bar in the title bar.

So I went on a mission to fix it.

To restore the regular title bar:

Go into Settings > General > Language & Appereance and uncheck the Hide system window titlebar

To remove search bar:

Toggle toolkit.legacyUserProfileCustomizations.stylesheets to true in Config Editor (bottom of Settings)

Find your profile directory via Help > Troubleshooting Information > Profile Directory (or about:profiles in same page)

This directory should have lots of files e.g. prefs.js and places.sqlite

Create directory chrome Inside that folder, create a file named userChrome.css with the below content:

#unifiedToolbar {
  display:none !important;
}

Restart Thunderbird

Enjoy!

  • I’m 23 and I cannot bear huge margins and rounded corners. They are ugly as hell, and the margins even take away a lot of usable space. I don’t want to use a 7" phone just because of this shit.

    When I started using Android (~7 years ago) the actual Material design was the thing. I liked it, and that is what I still like on mobile. Also it’s clearly better than what was before that.
    There were rounded corners, but they had a tasteful radius (2-3 dp in Android units), which I even liked more (and still do) than zero. Anything called “Material” after that is a lie, though, those have nothing to do with it, and mAtErIaL yOu is definitely not me; I read changelogs when updating apps, when I see there it seriously turns me down, and in cases I haven’t updated ever since, because the app works totally fine in the last version that is not the ugliest thing I have seen.

    I did not use the internet much in the early 2000s, but if I could I would much rather choose that design, even on my 5" phone, than today’s rounded corners and huge margins.