Rated 5 out of 5 stars

It was great while it lasted. I can see the developers have made it difficult (impossible) to port this for Thunderbird 115+ "SuperNova".

I have written some CSS for my userChrome.css to at least change the priority text to icons, but selecting in the CSS what priority a message has is problematic.

There is no explicit HTML Tag Attribute in the HTML/XUL for the message thread list that indicates the priority anymore. Each row in the message thread does have an attribute named "data-properties" ***NO, the attribute is "aria-label" *** (sorry!) attached to it, and that attribute does have the name of the priority in it. But this attribute also has the message subject in it, and the message subject could easily have the same words in it. And are the priority names LOCALIZED for language/region??? So searching for the priority in this attribute is not fool-proof.

I have submitted a bug report (enhancement request) explaining this (Bugzilla Bug #1884544)

Rated 5 out of 5 stars

I really like this. Especially the striped backgrounds. Sometimes it just quits working, then it starts working again. Very strange.

Rated 5 out of 5 stars

Very strange. It quite working for a while, then it started working again.

Rated 5 out of 5 stars

This is brilliant! The transparency striped background colors for the rows with prioritized messages allow my customized background colors per-tag (userChrome.css) and these priority background colors BOTH to be seen. And the icons in the Priority columns take much less space. In fact, with the row background colors, the Priority column is not really necessary at all.