Rated 1 out of 5 stars

I had great hopes for this addon but upon installing it on 56 (yes I know it says tested up to 48) it doesn't work, it generates no page when you type about:addons-memory and provides an error of an illegal call in the console:

NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIIOService2.newChannelFromURI2] in main.js at line 17

So unfortunately it seems it is quite dead and hence not helpful at all, if a modification can be made to bring it up to code, that would be great and I am happy to re-evaluate it.