Well our experiences differ then. I never had any issues on vanilla Ubuntu systems. After all if there was I 'd have to be on the phone to fix it while also reminding the fam that any non specified click us a left click.
To be fair I rarely had issues with Windows myself, at least post xp. But windows do fail, especially on updates and in quite bizarre ways. I ve had to solve quite a few over the years.
Provided your bank has not stopped supporting your “non-secure” browser. The previous browser vendor that had a functional monopoly did abuse user-agent to harass the competition. Using non IE required changing your user-agent to IE/Windows for a lot of sites.
Or as they say: