Please fix ebay sign in. If you allow all, it fails. If you disable addon for tab, it fails. Neither of those options should fail. Shouldn't have to disable addon to get it to work. However, I have been looking for something like this for firefox for a while, the closest chromium equivalent is sybu (search chrome store). Maybe it has to do with fact the sign is a popup window. I like sybu's ability to add root domains; try that extension to see what I mean. Wouldn't work with Sybu either. You should be able to whitelist a subdomain so that third party can load; not ideal by necessary probably for sub domains like signin.ebay.ca or whatever the sign on sub domain is for ebay.

Absolutely needed to kill websites that suck all your computer resources because of evil javascript.

Could you add a keyboard shortcut for allowing tab to run javascript?

Seems very straight forward simple to setup and understand working well so far ,altho started getting errors after it had been installed for a while