Diễn đàn hỗ trợ Thunderbird

Good morning, As the Release channel is the new default one, I updated my ESR version to the new 136.0. And now there are some things that doesn't work :-( I've my Exchange account configured with Owl addon. It's compatible, and it's enabled, but I see two bugs:

• Msg filter are not applied automatically, I've to apply them manually. Very annoying!
• The Exchange account Inbox messages are not displayed in the Inbox unified folder. I've to manually add it every time I restart.

Are these bugs from TB or Owl? How I should proceed?

How do I return to the normal appearance of the Proton mail and Proton calendar tabs. I can't use it in stark black and white because I rely heavily on color coding of accounts

I am running Thunderbird 140.0 on Windows 11. I want to have some buttons for extensions that are not in my toolbar appear in my toolbar. The advice for Firefox is to use the Extensions button in the toolbar, but I do not have that button in my toolbar and have not been able to find out how to get one into my toolbar.