Feature: Users should be able to whitelist sites that they want to save data when using "clear on exit"

[Brave-Matt]

Description

As it is now, users have the option to use Clear browsing data --> On Exit to erase browsing data once the browser is closed. The problem is that this removes any selected type of data from all sites when the browser is exited.

It would be worth implementing a feature wherein the user may add a whitelist/exclude list for the On Exit menu so that anything they do wish to save can be preserved.

For example, if a user wants to Clear data on exit for all sites except for duckduckgo, they would simply add DDG to the exclude list, then all site data would be wiped on exit with the exception of DDG.

[rebron]

Could possibly switch between profiles as a way to handle this. The UE for this could be fairly complicated/confusing.

[Brave-Matt]

@rebron,
Yes, they could possibly use different profiles but that seems like a much bigger hassle than necessary. In addition to the need to surface site-specific settings with respect to Shields (#3325), users should have the ability to keep some of their data from being wiped.

The way it is now with Clear on exit, it's basically an all or nothing approach - yes, you can select which data you'd like to clear but not from which sites. So if I want to clear all my cookies/site data on exit (or just in general), but I also don't want to have to login or re-enter data for gmail (example) there's no way for me to do this, I either clear data from every site I've visited in the selected time frame or none of it. Seems a little binary?