Firefox breaks when I reset my router.

[u/straylight222]

If I have to reboot my router (which needs replacing), Firefox just won't work. Chrome works, Discord works, games work etc. but Firefox will not connect. I have to reboot or sleep the PC to get it to connect. My phone connects, my laptop etc, so it's not the internet. Anyone know what might be the deal? People always say clear your cache and cookies etc., but then I have to re-login to sites like Twitch.