I found a little about the problem I thought was related to the post I linked:
When I updated to v. 2024.05.01, there was some pages in which the numbers were not showing. Setting g
fx.downloadable_fonts.enabled to
false would solve the problem. If you combine
gfx.downloadable_fonts.enabled = true and
browser.display.use_document_fonts = 0, the numbers won’t show up (the fonts I use are size limited, i.e., bitmaps). Looks like they fallback to the Twemoji font, which doesn’t has numbers.
Probably, before v. 2024.05.01, the missing font wouldn’t fallback to Twemoji, but to a more reasonable font (a system font, like Free Sans/Serif, in my case).
Considering the time when the problem started, I
guess it might be related to this:
https://repo.palemoon.org/MoonchildProd ... 0298f55eb6
I worked around it by adding FreeSerif as a fallback font in my
user.js file.