The other day I got a doorhanger notification that I believe was related to DoH. Alas as I tried to open the browser console, the doorhanger went away with seemingly no way to reopen it (bug 1649403). The reason why I opened the browser console is that the doorhanger text looked tiny, significantly smaller than the default text size on Ubuntu.

Text sizes for this doorhanger and other CFR doorhangers seem to be hardcoded to px values in browser.inc.css. This is generally the wrong way to specify text sizes. We need to use relative units (e.g. em) to make text smaller or bigger, and the default OS text size should rarely ever be undercut.

In this particular case I'm not sure why text sizes are meddled with at all. We should most likely just use the default text sizes generally used in popup notifications / doorhangers.

Andrei, is this a known issue with CFR doorhangers?

The DoH message uses the same styles as the other messages, afaik we haven't had any issues reported about font size so I suspect system customization that we don't follow. I'll look into this.

(In reply to Andrei Oprea [:andreio] from comment #2)

I suspect system customization that we don't follow.

I haven't customized my OS text size.

Triaged on Dec 7.