Comment 5 for bug 1648649

Hi Chris! I'm still seeing this issue (in latest Firefox Nightly), BTW. I'm also noticing that "about:startpage" (the default homepage imposed by the extension) does not load in affected versions, possibly due to this same issue.

Also: there's one more step that you need to perform before you can test this in Nightly now: you have to set the about:config pref "extensions.allow-non-mpc-extensions" to "true". Otherwise, the Ubuntu Modifications extension will get auto-disabled, as described in https://bugzilla.mozilla.org/show_bug.cgi?id=1364978