HTTP Cache
nsicachestorageservice the http cache entry-point.
... //github.com/realityripple/uxp/blob/master/netwerk/cache2/nsicachestorageservice.idl "@mozilla.org/netwerk/cache-storage-service;1" provides methods accessing “storage” objects – see nsicachestorage below – giving further access to cache entries – see nsicacheentry more below – per specific url.
... mandatory argument to *storage methods of nsicachestorageservice.
...And 4 more matches

nsICacheService
66 introduced gecko 1.0 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) this interface is no longer supported and planned to be removed soon: use nsicachestorageservice instead.
... at the time of writing there is no documentation for nsicachestorageservice but comments are available in the source.

Services.jsm
service accessor service interface service name androidbridge nsiandroidbridge 1 appinfo nsixulappinfo nsixulruntime application information service appshell nsiappshellservice application shell service blocklist nsiblocklistservice blocklist service cache nsicacheservice cache service cache2 nsicachestorageservice cache storage service clipboard nsiclipboard clipboard console nsiconsoleservice error console service contentprefs nsicontentprefservice content preferences service cookies nsicookiemanager2 cookie manager 2 service cpmm nsimessagesender child process message manager4 crashmanager crashmanager.jsm ...