As part of the plan to improve site data management further (tracked in bug 1421690) we'd like to de-clutter the preferences UI by merging network cache settings into the site data section. The preliminary spec can be found in bug 1421690.

Comment on attachment 8950544 [details] Bug 1422160 - Merge cache and site data in about:preferences. https://reviewboard.mozilla.org/r/219826/#review226070 You'll most likely have to rebase on top of bug 1424682 which should be landing very soon. ::: browser/locales/en-US/chrome/browser/preferences/preferences.properties:173 (Diff revision 2) > -totalSiteDataSize=Your stored site data is currently using %1$S %2$S of disk space > +totalSiteDataSize1=Your stored site data and cache are currently using %1$S %2$S of disk space > loadingSiteDataSize=Calculating site data size… Do we need to call out cache from site data? To most users, is cache considered part of site data? Also, the loadingSiteData string doesn't mention cache but the total one does.

Comment on attachment 8950544 [details] Bug 1422160 - Merge cache and site data in about:preferences. https://reviewboard.mozilla.org/r/219826/#review226070 > Do we need to call out cache from site data? To most users, is cache considered part of site data? > > Also, the loadingSiteData string doesn't mention cache but the total one does. The main problem we're trying to solve is that there are too many ways to clear any kind of persisted data from websites in preferences, be it cache, cookies or site data. We know that most users can not differentiate between them or tell us what they are used for. To clear all of them, users have to perform multiple actions (which leads to all sorts of misinformed incorrect usage). We would still like to offer users the chance to find cache in preferences by explicitly looking for that word, because, as you say, most users who know about cache and site data probably don't consider them to be the same. I hope that explains this change :) You make a good point about loadingSiteData, I'll fix that up! Thank you!

Pushed by jhofmann@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/e8d05c7218c6 Merge cache and site data in about:preferences. r=jaws