Previously, NoSquint was the go-to extension in Firefox to adjust page magnification ... especially for us alte kackers whose presbyopia is snowballing.
Unfortunately, (1) there was a glitch in the app which allowed page magnification to revert to default mode (even with exception status), and (2) NoSquint was given up by its creator earlier this year.

I've since switched over to Zoom Page (one of the recommendations of NoSquint's creator) which seemed at first blush to have even better functionality than NoSquint.
But such was not to be: I've experienced the selfsame glitch with Zoom Page, sometimes while simply viewing a given web page. Granted, it's pretty easy to zip up to the tool bar and correct such, but it's also annoying to have to do so.

Anybody got any suggestions to resolve the issue?