User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0

Steps to reproduce:

While in the folder list, it is very easy to see what folder is selected, as it has a bright blue background. When clicking away from the folder list, the currently selected folder is highlighted with a color that is barely distinguishable from the background color, so I find it extremely difficult to know which folder I am looking at.

Actual results:

Folder highlight is difficult to see. In the attached picture, the "solr-user" folder is selected.

Expected results:

Folder highlight should be a different color.

Windows latest beta is slightly better, but I think the highlight should be more obvious.

In this picture, the selected folder is "haproxy". While this is a ton better than Linux, it's still not very visible.

This is even worse in 112.0b5. Now the active folder is not highlighted AT ALL after clicking out of the folder list. Before it was just hard to see because the background color was very close in color to the overall background, now it's not different at all.

I am NOT changing that needinfo thing. The browser auto-refreshed on its own several times and changed that setting each time it did so.

On daily we currently use a transparent variation of our primary blue color.
Can you check the changes?

I do not know why that happens. I opened the bug, logged in, and it started doing those updates all by itself ... the page refreshing automatically. I closed the window, and went back to the bug. It was then fine.

I managed to get the nightly version of firefox installed by snap, using the --edge option, but it doesn't appear to be possible to install the nightly version of thunderbird that way. The edge channel just falls back to beta.

I found instructions for installing the daily ppa, but after I do, the package 'thunderbird-trunk' is not available and I cannot see anything else that might be the daily build. This machine is running Ubuntu 22 desktop and is fully up to date.

I went diving into the apt repository, and it only has firefox-trunk packages, no thunderbird.

I obtained thunderbird-114.0a1.en-US.linux-x86_64.tar.bz2, extracted it, ran it, and connected it to my mail account.

It looks the same as the beta version.

Have you tried in dark mode? I tried to switch to a light version of the theme, and it did not switch. So I can't try it in light mode for some reason.