I was hoping to use this extension to open about:newtab during "Private Browsing", but I see from older replies that not all about: pages are allowed with Web Extensions. If about:newtab is allowed, could you add it?
about:newtab is not allowed, maybe it will be allowed in the future. I already asked Mozilla and there was kind of agreement that it makes sense. But I don't think it will be possible in Firefox 56 and 57. But once it will be possible I'll add about:newtab to the allowed URIs.
