Since the last few upgrades (I'm up to Firefox 90.0.2) I find blank pages on many petitions I wish to sign, and am forced to use Safari to complete them. (Normally, I NEVER use Safari.) I would like this fixed. It's a nuisance. The last time it happened (about 10 minutes ago), I was signing an Elizabeth Warren petition. It doesn't happen with well known petition sites, but has happened often enough with other sites, including Lakota People's Law Project (the next most recent incident, yesterday.)