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Why is there a 120 MB "storage" folder in my profile directory?

  • 15 uphendule
  • 3 zinale nkinga
  • 125 views
  • Igcine ukuphendulwa ngu finitarry

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There is a 120mb folder called "storage" in my profile directory which wasn't there before. The last time I checked was when I disabled disk cache some weeks ago (guess it may have to do). The Offline Web Content and User Data options seem irrelevant, so I would like to know what it is, and how to prevent it from being created, or at least growing so much. 106mb of it is in a "temporary" subfolder for unrealengine.com, but if it is temporary, why is it still there weeks after I visited that site? I'm just trying to minimize drive usage and occupation as much as I can without losing usability, so any other tips for that would be welcome.

All Replies (15)

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Um, have you tried looking in the options...?


Options -> Privacy -> "Clear history when Firefox closes" [Settings...]

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Unfortunately that did not work carbohydrates. The folder is still the same size.

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Have you got dom.storage.enabled set to true in about:config? If you remove the folder and set dom.storage.enabled to false, does it come back?

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Sadly it does come back even with that setting set to false finitarry. This page makes the folder 114 mb big immediately: https://www.unrealengine.com/html5/

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You shouldn't disable local DOM storage (leave dom.storage.enabled = true) as it can cause issues.

What folder under the storage folder takes up that much space?

Firefox stores the snippets used on the about:home as well in that location.

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cor-el, the folder "temporary" is the one, and inside it another named "https+++www.unrealengine.com".

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That means that the unrealengine.com website is storing this data.

Do you have any software from that website installed?

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No, as I said above, in my reply to finitarry, just by visiting that link (https://www.unrealengine.com/html5/) I get 114 mb in that temporary storage folder. I don't want any sites creating storage files in my drive whenever they like without my permission.

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cor-el, according to that link: "The user interface will just ask permission for storing blobs bigger than 50 MB". I am not being asked permission by FF, so it's safe to assume the link is not related to my problem. That means I still don't know why FF is letting a website immediately create 114mb of data in my profile folder, labelling it temporary, and letting it sit there forever. Especially after I disabled the disk cache to prevent that kind of bs.

Anyway, I'd appreciate it if you check if you also get it from the link I posted. https://www.unrealengine.com/html5/ I hope it's not just me.

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That looks like a game and all the game data is likely stored locally to be able to play this game.

See also:

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Fair enough cor-el, but I would still like to know if there is a way to prevent FF from potentially downloading gigabytes of data from a single page with the pretext that it's a game.

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You could change that limit from 50 MB to 1 MB. That way, you should get notified sooner.

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I don't get notified at all finitarry.

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If the amount of data to be stored exceeded 1 MB, you would get notified, instead of requiring as much as 50 MB. I have not been notified either, so I guess Adblock Plus and whatever other extensions require indexedDB are not using more than 1 MB.