Submitted via IRC for TheMightyBuzzard
Mozilla on Monday was the first to make an official announcement, but the developers of Chrome, Edge and WebKit (the layout engine used by Apple's Safari) said they plan on doing the same.
AppCache is an HTML5 application caching mechanism that allows website developers to specify which resources should be available offline. This improves speed, reduces server load, and enables users to browse a site even when they are offline.
While application caching has some benefits, it can also introduce serious security risks, which is partly why it has been deprecated and its use is no longer recommended.
Source: https://www.securityweek.com/major-browser-vendors-restrict-appcache-secure-connections
(Score: 0) by Anonymous Coward on Thursday February 15 2018, @06:09AM (1 child)
Aaaand, to clear the cache open prefs > advanced > network or manually wipe OfflineCache under your profile directory.
(Score: 2) by KritonK on Thursday February 15 2018, @10:03AM
Quite predictably, there is no prefs->advanced in Firefox 58, so the offline cache cannot be wiped from there.
History->Clear Recent History does have an Offline Website Data entry, though, which I assume does the same thing.