create interface to blacklist/whitelist certain sites from modification #12
Description
For a while at the beginning, we weren't filtering out user-editable text nodes and were modifying text in places that we really didn't want to, such as gmail's compose dialog, wikipedia's edit page, or facebook messenger's input field. This was eventually fixed, but made it annoying to have on even for fun, since it would modify the text you typed as you typed it.
To reduce further friction with adding this for fun, it would be very useful to have some simple interface that allows the user to specify sites that they don't want modified (e.g. a news site with quality content where the text substitutions would be annoying instead of amusing).
Currently, I'm thinking of just allowing a domain blacklist, but this could turn into regexes or wildcard patterns.