I'm afraid you're right.
Back in the early 90's I switched from SpyGlass (NCSA Mosaic) to Netscape, and from Netscape to Firefox. (Spyglass was bought by Microsoft and became IE.) I've used Firefox ever since because I have to run everyday on Windows, Linux, and Mac computers, and using different browsers with different rules and bookmarks was insane. Firefox was my sanity.
No more, sorry to say. Sic transit.
Pretty much follows what I've used browser-wise. I remember firefox when it was a .1 release. Started using it regularly as a .2 before they actually settled on the FF name. My bookmarks file is ancient, and has migrated from one computer to the next up to the present day. Of course, I've got craploads of links that are no good any more (there's a couple of gopher protocol links in there that I don't even think Firefox even recognizes these days.) I like that FF still allows you to export your bookmarks as an HTML file. (in addition to the more current json as well). My bookmark file has been my 'homepage' for years because it's quicker than opening any external webpage.
I really hate the thought of changing browsers, but I imagine I will have to some day. Not looking forward to it.