Address addon limitations/API's on different browsers (ublock origin specifically)

[squeak9]

"uBlock Origin works best on Firefox" according to the developer: https://github.com/gorhill/uBlock/wiki/uBlock-Origin-works-best-on-Firefox

Seems that addons are less capable on certain browsers especially when it comes to privacy preserving addons like ublock origin, this should ideally be reflected on the website.