Add feature to enable / disable the the extension temporarily

[alehresmann]

trafficstars

Ublock origin does this for example. It fixes the following use-case:

• have JS turned-off by default, with the "block JS by domain" mode selected.
• visit some website which requires JS but does so using scripts from 3rd party websites, or different domains but still owned by the same company, (often happens for banking websites for example)
• Turn on JS, but still have a nonfunctional site because necessary scripts from other websites are still blocked.
• Be hence forced to either: a) go into extensions and manually disable the extension temporarily, or b) figure out which websites the scripts were requested from, whitelist them, then try again.

Unfortunately option b) can often be time consuming if the website in question uses many different 3rd parties and/or domains, so I often revert to a).

[dpacassi]

Thanks for the input, that really sounds useful and I'll definitely try to add it in a future release!

Please keep in mind that contribution in any form (pull request or PayPal) to speed up things are welcome at any time!