In FF68+ on Mint Linux, fresh FF install, no extensions, I get "Gah You Tabs crashed", repeatedly when trying to login to Amazon, or many other sites. I have to downgrade to FF 67, and disable all updating, and I had to disconnect my network connection to do that since FF updates automatically by default. I tried the latest 69b build as well, and got the same problem. I disabled and re-enabled hardware acceleration. No change. It seems that complicated sites running a lot of Javascript that do anything with cookies some how kill the tab. If the tab is restored, it just crashes again.