I think the ~/.mozilla/firefox/XXX.default-YYY/storage/default/https+++ZZZ.com/cache/https+++domain.com/ style dirs are the storage for what's called "service workers" which is persistent code related to each website that sends notifiications even if no related tab is open.
Suppose you have a favorite website that sells something, you might register with them that you're interested in a particular kind of product. A serviceworker for that site would be in the "ZZZ" folder named after that site, the code in there would run even if you don't have a tab open for that site. It's done so you can get a notification. In other cases it's some other code that the web designers don't want to have to reload each time you visit, caching it in your storage folder saves time and network.
You can see all your service workers in the Firefox menu: Help -> More troubleshooting information -> about:serviceworkers ( or load about:serviceworkers )
As a database developer, you want these sub-transactions or autonomous transactions to be processed and committed regardless of what happens to the larger surrounding transaction block.
The pg_background Postgres extension originally written by Robert Haas starts a separate worker to process a SQL statement, which is a nice way to achieve an autonomous transaction.
As the nation’s health protection agency, CDC saves lives and protects people from health, safety, and security threats. I used this website to look up information on rabies, as well as other diseases to compare it to.
A database that contains information about microRNAs and their targets in the genome. I use this to get information about miRNAs I encounter in articles.