TWM & Odd Menu Issue

[Graham Bentley]

Hi,

How to go about diagnosing this?

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Lifelong fan of TWM; still using today and came across your pages/site.

The main reason for this enquiry, is to ask if you suffering recently 
the problem of TWM not working well with latest Firefox and Chromium 
browsers using mouse interaction particularly?

I use TWM 'raw' (no compositor and so on) and both browsers have worked 
without issue until the latest esr release for Firefox and a few 
releases ago for Chromium (not entirely sure when for Chromium). Other 
programs do not have any similar issues that I have noticed.

The problem is that some popup/transient windows that appear when mouse 
clicking on menu options in those browsers (and even some 'select' 
inputs on webpages) are now closing instantly preventing interaction - 
flash on and off so to speak.  I'm not technically advanced enough to 
sort out why, but I am curious about whether other folk might be able to 
have a stab.

The problem is more captured here: 
https://www.linuxquestions.org/questions/linux-software-2/latest-chromium-and-firefox-popup-transient-windows-show-and-close-immediately-using-twm-and-when-using-mouse-4175728539/

Thanks