have you upgraded firefox and checked it. goto help->about firefox and update it.

Report us back . Thanks.

Yes I have upgraded Firefox - I suspect that was the cause of the problem.

I know it occurs in the most up to date version, 20, and also 19, but not sure when the problem first occurred as I've only just noticed it.

Hello,

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• You can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
• Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

I am using the default theme and the problem still exists in safe mode.

I have also just upgraded to the a new version 20.0.1, and the problem exists there too.

Does the specified cache location exist (i.e. you can open the folder in Firefox via the location bar)?

What does the about:cache page show for the disk cache?

Yes the cache location exists; the about:cache shows the offline cache directory is set to the default one for Windows, i.e. overriding my own settings.

I suspect it is to do with the multi-cache directory scheme used in FF these days.

The browsing cache is not the "Offline cache device", but the "Disk cache device".

The latter will be missing if you use "Clear history when Firefox closes" to clear the cache because that will make Firefox use only the memory cache.

Yes apparently I did have "Clear history when Firefox closes" set.

I've turned it off now and can see the correct settings in about:cache, and can also see the cache directories created where I expect them to be.

However I've noticed that icons in the jumpListCache and thumbnails are still being written to the default windows location. (As an aside, even though I had had clear history set, there were over 32,000 items in the jumpListCache directory).

I suppose I could disable thumbnail capture as given here: https://support.mozilla.org/en-US/questions/941770?esab=a&s=profile+thumbnails&r=3&as=s

... not sure that I want to do that though. I may just live with it.

The jumpListCache issue is apparently a known bug: https://support.mozilla.org/en-US/questions/933376

Thanks to all who responded.

For jumpListCache , I found that setting browser.taskbar.lists.enabled to false prevents their capture:

http://forum.palemoon.org/viewtopic.php?f=13&t=1985&start=10

Hi nuwon,

Just found your entry about preventing capture in the jumpListCache by toggling Browser.taskbar.lists YES it worked on my version 9.01 Are there any side effects ? How did you find it?

Thanks Jim.

Hi Jim, I have not noticed any side effects. I found the info by searching the Palemoon forum as I use the Palemoon browser ( a spin-off of Firefox) for its 64-bit version on Windows.

nuwon

I was wondering why there was a link to Palemoon forum. I've not heard about the Palemove browser, how long has it been around?

Thanks again in helping me remove more unwanted files from my SSD.

Cheers Jim