Rated 4 out of 5 stars

lately the html5 video player controlls are gone until you once disable the addon , play a video and then enable it again.

You might want to look at https://discourse.mozilla-community.org/t/how-to-determine-the-mime-type-of-the-loading-document-in-a-content-policy/9917?u=desktopd

Rated 5 out of 5 stars

great! any known addons it breaks ?

This review is for a previous version of the add-on (0.1.0). 

It will only break some of the add-ons that load their own files into Web pages. It should be compatible with uBlock Origin and HTTPS Everywhere for example.