Hello,

ScrollAnywhere is fully compatible with e10s and should work in every new Firefox version, including Firefox 57 nightly (which I'm using right now).

BUT! Be aware that all new add-ons are blocked on:
- whole domain https://addons.mozilla.org (so scrolling won't work here)
- all internal pages like about:addons or options page

Also make sure you don't use other add-ons with similar functionality that could cause these issues...

Please let me know if this helps.

Have a nice day,

Best regards,

Juraj Mäsiar