This is on-par with asking how to keep using your 32-bit and PowerPC apps on MacOS. Not even OSX, but modern MacOS. The OEM is actively pulling support and work

This is on-par with asking how to keep using your 32-bit and PowerPC apps on MacOS. Not even OSX, but modern MacOS. The OEM is actively pulling support and working against you. There is no stable solution; at best you can have "This week we're doing X", and the correct solution is to move away from the unsupported software that depends on depreciated APIs that are being actively ripped out. Having "no alternative" is one of the many reasons the open ecosystem we call the web, matters. Why having a single choice, especially one run by an ad agency, is a shite spot to be in. Unless you are willing to do your web browsing on an unpatched version of Chrome, or a fork run by a smaller team that "can totally keep up with Google's pace of development, trust us, those security patches made it in", you're kind of hooped.