This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

How many cache locations are there in Firefox?

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by JoeB

JoeB
JoeB
more options

In the most recent Fx versions, how many possible places can various content be cached?

Any idea on which cache clearing addons can clear all locations - if such an addon exists?

I've read that some cache clearing addons can't clear all the locations in later versions, because most of them use the Firefox api. Some of the addon devs claim that api must not clear all locations (one or 2 newer). Not sure.

I do know that occasionally, when a web page messes up, or login fails, just clearing the cache using "clear cache button," doesn't always clear it enough (but sometimes does). Neither does using clear cache from inside Options.

The page will still think I don't have cookies enabled or what ever the problem was. I assume that's because of data left in cache. Even if not, I've still read a number of places that perhaps not * all * cache is cleared (in later versions) by typical means.

In the most recent Fx versions, how many possible places can various content be cached? Any idea on which cache clearing addons can clear all locations - if such an addon exists? I've read that some cache clearing addons can't clear all the locations in later versions, because most of them use the Firefox api. Some of the addon devs claim that api must not clear all locations (one or 2 newer). Not sure. I do know that occasionally, when a web page messes up, or login fails, just clearing the cache using "clear cache button," doesn't always clear it enough (but sometimes does). Neither does using clear cache from inside Options. The page will still think I don't have cookies enabled or what ever the problem was. I assume that's because of data left in cache. Even if not, I've still read a number of places that perhaps not * all * cache is cleared (in later versions) by typical means.

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

There is only one main location for all the caches that Firefox uses and you can find the location of the disk cache on the about:cache page. You can go one level up (i.e. remove the trailing \Cache) to see the other folders.

JoeB
JoeB Question owner
more options

What about this:

I'm using FF 28.0 and I like the idea, but it doesn't clear enough of the cache for FF to reload fresh YouTube thumbnails. I have to clear cache via FF Options>Advanced>Cached Web Content.

Not an add-on issue

by mvm (Developer) on April 29, 2014 · permalink · translate Hello, thanks for your input.

This add-on calls the original Firefox APIs to clear cache. Thumbnails are apparently not included in those calls.

It may be added in the future but this is a feature request, not a bug. PS. - formatting on my post is messed up. It refuses to allow returns (skipped lines) in the long paragraph, if blockquote is used.

Instead, I had to select, then apply italics, separately to each line(s) - if using the italics format button - following a paragraph break, on the quoted (pasted) content.