How can I block quick filter Bar permanently?

I can uncheck quick filter in the view bar, but he's back on the next start upward. I do not use it, and it takes up to message
space on the screen. I'm NOT using CCleaner.

I wouldn't play with any substance within a file.
First of all you never know what can make a faulty entry.
Secondly, many of these files are rewritten to starting or closing of Tbird.
So is SessionCheckpoints.json.

@ Matt
Thanks for the link

Tags: Thunderbird

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