Does not work with e10s enabled

[jnachtigall]

Love this tiny add-on. I use it whenever I have to renew books at my library and it needs me to check about dozens of checkboxes one by one...

I noticed that it does not work anymore when e10s is enabled. Would be great if this could be fixed.
https://developer.mozilla.org/en-US/Add-ons/Working_with_multiprocess_Firefox

[jnachtigall]

Filed also https://bugzilla.mozilla.org/show_bug.cgi?id=1278099 on this.

[MurzNN]

Will be glad to see e10s support because it will stop working on Firefox 57.

[tschwinge]

Confirming that version 0.9.2.1-signed.1-signed no longer works with Firefox 57 (as provided by Debian experimental, 57.0~b6-1). https://support.mozilla.org/en-US/kb/firefox-add-technology-modernizing, https://developer.mozilla.org/en-US/Add-ons/Working_with_multiprocess_Firefox.