Firefox 93, available from October 5, has some additional improvements, one of which is meant to help help reduce out of memory crashes: When Firefox detects system memory critically low, on Windows, it'll automatically unload tabs based upon their last access time, memory usage, or other aspects. So, if you return to a tab and find it is no longer loaded, you will know why.
There's also a new referrer tracking protection, and blocking of download that rely on insecure connections, amongst other improvements.
[
mozilla.org...]
