MaterialFox and Firefox 52.9.1 ESR

[FranceBB]

Hi,

I was trying to install the MaterialFox theme, but I think it doesn't support Firefox 52.9.1 as it's clearly not working as intended:

As you can see, the back and forward arrows are there, but they are not displayed (top left) and the icons of the websites are wrong as they are too close to the text.

https://github.com/muckSponge/MaterialFox

The extension is created in .css, so I think that it can be modified/adapted for Firefox 52.9.1 ESR if someone has a little bit of time to lose.

Unfortunately, I can't play with it this very moment.