Next Update for Edge not compatible with my mac

Hi, so I'm so sorry if this isn't the right place or if I'm doing this wrong, but I'm kind of freaking out. So I use Edge on an older mac that cannot be updated as mac no longer supports updates for it. I was previously using Edge Dev and after an update got a message saying that the next update won't be compatible with my mac and I tried not to update but at some point Edge Dev restarted and thus updated and then it wouldn't open on my mac, so I switched back to regular Edge. After the last update on regular Edge, I got the same pop up saying that the next update won't be compatible with my mac and now I'm terrified that when that update comes out at some point Edge will restart and update and then I will lose my ability to use Edge. I love Edge as a browser and have so much stored in it. I have exported my passwords just in case, but am still super scared that I'll lose all the work I've put into Edge and that I'll just lose Edge as it's such a superior browser that I've come to rely on. Does anyone have any suggestions on what I should do? I can't afford to get a new computer right now and as I mentioned my Mac doesn't support updates. Any help would be unbelievably appreciated. Thanks in advance.