I would suggest that you are not providing all the facts.
I am banned in 2 subreddits (run by the same group of mods). I was banned for breaking the rules. Fair enough. Like many people I have more than one reddit account and while logged into an alt made a comment on the sub I was banned from.
Different account name, same browser, probably the same IP and it was a perfectly innocuous comment. Nothing bad, nothing rule breaking. I assume the mods joined the dots, told the reddit admins and I was suspended from reddit for I think 2 days. Maybe 5. Maybe 7. I really cannot remember.
I also use Firefox, Firefox Dev, Edge, Safari and Brave to access reddit but FF is my main and old.reddit.com is always on.
What I suggest you did was to login with a different account and then comment in the sub(s) you are banned from. They suspended you which is fine - they do make this very clear. They got me, they got you.
This was the same account, as I have only one account. Not sure the same IP address can be used as "identifier" either, because I use Reddit both at home and at work.
Ref. my ban, I'd call it a soft ban: I posted a meme based on an image that didn't belong to me. I thought it was a bit harsh, because I see that all over the place, but it's true, and totally OK.
But I never touched that subreddit again. And everything was fine until I started using Firefox for my day to day browsing habbits.
I am banned in 2 subreddits (run by the same group of mods). I was banned for breaking the rules. Fair enough. Like many people I have more than one reddit account and while logged into an alt made a comment on the sub I was banned from.
Different account name, same browser, probably the same IP and it was a perfectly innocuous comment. Nothing bad, nothing rule breaking. I assume the mods joined the dots, told the reddit admins and I was suspended from reddit for I think 2 days. Maybe 5. Maybe 7. I really cannot remember.
I also use Firefox, Firefox Dev, Edge, Safari and Brave to access reddit but FF is my main and old.reddit.com is always on.
What I suggest you did was to login with a different account and then comment in the sub(s) you are banned from. They suspended you which is fine - they do make this very clear. They got me, they got you.
It has nothing to do with browsers.