Firefox being irrelevant and Safari coming to the rescue against Chrome is a pipedream. Apart from their upper management issues and community unfriendly UI department, Firefox is doing just fine imo.

Firefox’s stats look bad because they block trackers by default (enhanced protection) and most news sites and tech “journalist” take a user stats off of a tracking company (statcounter), which depends on script placed on websites to “track” users which is blocked.

Firefox users are also more likely to use superior adblocks and privacy extensions which doesn’t do its usage metrics any justice. There are also popular forks which come with these things inbuilt which are still Firefox.

Apple should start allowing alternative browser engine on iOS and also start blocking trackers by default too, since it so overwhelmingly likes to market itself as “privacy friendly” and see how soon its usage stats drop.

This is coming from a Firefox user who remebers the founding of Mozilla and the company name being a combination of Mosaic and Godzilla.

Sandboxie might help? (For Windows)

https://github.com/sandboxie-plus/Sandboxie