I've just installed 57 for me. The English Dictionary is gone -- now all the words I type here are with wiggly lines, I see "add dictionaries" but I had the darned dictionary already and what's the use trying to add the same? I don't know what to do next. The extensions are all gone, including the NoScript for which the developer claimed that he's adding support for new Firefox -- I checked noscript.net -- I have had the very last version. The mozilla site writes "Not compatible with Firefox Quantum". Noscript was the most used extension from a dozen I have had.
From the less used ones, as an example I've used "Copy Plain Text 2." Now I see there's a new similar and compatible extension by somebody else I guess, but it's obviously more limited: "Note: WebExtension API does not allow setting Copy PlainText as the default copy function of the browser at the moment, neither does it allow user defined keyboard shorts. Once there are such an APIs, I will add the feature."
Others have no replacements at all, not surprising seeing the limitations even for the simple "Copy Plain Text."
(Edit: regarding performance details see my other posts here.)
I was rather asking about performance for your girlfriend.
Regarding addons, I'd say give it time. It's a chicken and egg problem that will be solved with time. I was not expecting to switch until end of the year.
From the less used ones, as an example I've used "Copy Plain Text 2." Now I see there's a new similar and compatible extension by somebody else I guess, but it's obviously more limited: "Note: WebExtension API does not allow setting Copy PlainText as the default copy function of the browser at the moment, neither does it allow user defined keyboard shorts. Once there are such an APIs, I will add the feature."
Others have no replacements at all, not surprising seeing the limitations even for the simple "Copy Plain Text."
(Edit: regarding performance details see my other posts here.)
It's really as bad as it can be.
It's really bad.