FYI:
"Waterfox has updated to 56.0.2. Had to re-enable/check 'extensions.e10sBlockedByAddon' and 'extensions.e10sMultiBlockedByAddons', which enabled multi-process again, and hoped that would also help with the ugly slow page loads ... it doesn't, so that must be the meltdown/spectre patch (same one as FF) that's been included. Is this a good way to guage how slow overall system would be when patched? If so, am really concerned."
source:
https://forums.linuxmint.com/viewtop...10866#p1410866