This shouldn't be the case. Would you mind sharing screenshots of the link you're pressing, preferably with video to hello@ our domain? We'll investigate. In the meantime, you can signup/login here: https://linear.app/login
On browser detection, we need to look at Edge. I don't think we updated the list in a while (we support all evergreen browsers).
On a side note, I use Edge on a Mac and the signup page doesn't detect my browser as compatible; it's just Chromium inside, must be totally compatible with everything.