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

Posted

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.

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.

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 11.31.2 for Mozilla browsers
  • Shockwave Flash 16.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0

More Information

carbohydrates 2 solutions 30 answers

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


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

Um, have you tried looking in the options...? Options -> Privacy -> "Clear history when Firefox closes" [Settings...]

Question owner

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

Unfortunately that did not work carbohydrates. The folder is still the same size.
finitarry 251 solutions 3421 answers

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?

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?

Question owner

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/

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/
cor-el
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17472 solutions 157915 answers

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.

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.

Question owner

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

cor-el, the folder "temporary" is the one, and inside it another named "https+++www.unrealengine.com".
cor-el
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17472 solutions 157915 answers

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

Do you have any software from that website installed?

That means that the unrealengine<i></i>.com website is storing this data. Do you have any software from that website installed?

Question owner

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.

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.
cor-el
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17472 solutions 157915 answers
See also indexedDB: *https://developer.mozilla.org/IndexedDB

Question owner

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.

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.
cor-el
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  • Moderator
17472 solutions 157915 answers

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

See also:

That looks like a game and all the game data is likely stored locally to be able to play this game. See also: *http://blog.mozilla.org/blog/2014/07/22/first-commercial-web-games-launch-leveraging-mozilla-pioneered-technology/

Question owner

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.

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.
finitarry 251 solutions 3421 answers

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

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

Question owner

I don't get notified at all finitarry.

I don't get notified at all finitarry.
finitarry 251 solutions 3421 answers

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.

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.