Make a notification banner when fingerprinting is on for certain sites and is known to break them

[bbondy]

We should warn the user that this site has known problems when fingerprinting is enabled. With an option to disable now.

• Google docs?
• Hangouts?
• Others?

cc @luixxiul @diracdeltas

[luixxiul]

that's what exactly I was going to propose :-)

[srirambv]

similar to #3723?

[luixxiul]

Sometimes it would be hard to put a placeholder on a broken page like google sheet. #2343

@bsclifton has created an issue for this here -> #2965

[bbondy]

ya I think we came to that same conclusion in that ticket but I'll leave this one open instead.

[diracdeltas]

should this be a whitelist or just a notification that appears whenever a site is trying to access fingerprinting APIs (canvas, webgl, audio, etc.) in a first-party context? i am leaning toward the latter because maintaining the whitelist will be a lot of work.

[bbondy]

if you can get the generic way to work that'd be even better ya.

[bbondy]

I guess it depends on how common we have fingerprinting stats show up. If it's not very common the generic way is probably better.