In the web development company I work at we use a certain TLD that has many subdomains for different uses; Testing environments and some internal services all have their own subdomains. Especially for the first a wild card TLS certificate makes it is easy to spin up a new environment. I would like to segregate these different websites for some features in Firefox. Currently I can think of the following: History "Forget About This Site" deletes based on the TLD. I sometimes just want to forget everything for one subdomain instead. Total Cookie Protection has a separate cookie container based on the TLD. But with these many environment I would actually like them to each have their own cookie container. Some self-hosted but open source services, or some tools, are a mess about how they store their cookies (on TLD, not full domain), messing up some other services which do have their own domain after all. This is something that would help me as a power (developer) user. I'd be completely fine with there being an about:config setting where I could define some masks to influence these definitions of a 'site'. What do you think about this? Would this be something I could create an issue for in Bugzilla?
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