Had sites randomly not loading because they were stuck in a refresh loop. Always the same specific sites, none of them were mobile sites or m.* links. Did the "disable & reenable all extensions until the problem goes away" trick & found that it's this one causing it. Really nasty bug.

currently at least on Finnish technology news site https://muropaketti.com/ this addon thinks that it is mobile site even tough it isn't.
that triggers endless loop, when this addon tries to load main site while it is in the main site.
that makes browser endlessly reload, not only on their main site, but also on their news articles too.