Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to find youtube video (just watched) in Firefox cache folder, but I cant find the folder.
win xp sp3
Firefox 16.1
I tried

C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\xp44aixq.default\Cache


C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\49mvq84u.default\Cache

In this folder I found the png thumbnail of visited youtube page

C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\49mvq84u.default\thumbnails

But, there is no video file.
I also searched all files and folders arround (Default user, All users...etc).
There is only one win user.

share|improve this question

migrated from Nov 2 '12 at 17:07

This question came from our site for professional and enthusiast programmers.

up vote 2 down vote accepted

The video will be there in the cache only as long as you are seeing it in the browser, after which it is deleted automatically. I would recommend using plugins provided by modern browsers if you want to download the video.

share|improve this answer
Mayank, are you sure. I found so many sites where is explained that the video should exist in cache till browser is closed? – Alegro Nov 2 '12 at 8:43
Now, I searched the folders DURING the video watching. No result. – Alegro Nov 2 '12 at 8:53
Did you check about:cache ? – Mayank Sharma Nov 2 '12 at 9:47
Yes, I did. file on disk: C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\49mvq84u.default\Cache\4\3A\65440d01 but there is no such a file on the disk – Alegro Nov 2 '12 at 13:37
i checked it on Windows 7. The file exists but not as a regular video file. i think that it would also depend on how much space you have left in the cache. win 7 has around 300 Mb of cache – Mayank Sharma Nov 2 '12 at 15:07

You can check the cache file easily by going to the following:


Enter the above into your URL or location bar.

share|improve this answer


Tested version

Firefox 38.0.5

Shockwave Flash 17.0 r0

Latest Firefox with latest Flash player on Windows will save the Flash videos in

C:\Users\<your user account>\AppData\Local\Temp\acro_rd_dir\

The file will be something like fla****.tmp. You have to change the .tmp extension to .flv extension to make it playable (Most modern players will accept a drag and drop of the file even without changing its extension).

**** If you have trouble in finding the folder Hit Windows+R and in the popup Run Dialog copy and paste this


and hit Enter.

share|improve this answer

Regarding viewing the cache contents, there's a nice Firefox extension named CacheViewer Continued - like the name suggests, it's a fork of the CacheViewer.

Regarding the question about YouTube video being in cache, I've answered a related question yesterday. Basically, most of the videos you watch on YouTube won't be cached -- if they exceed certain size (you don't want to purge your whole cache after watching several videos).

If you want to download videos, you can use one of the addons from or userscripts. By the way, you can also view URLs of all the resources loaded on the page (including audio and video files) by opening AdBlock Plus' "Open blockable items" menu.

share|improve this answer

Use Firebug!

The OP has already said he's using Firefox, so he might as well take advantage of that fact.

Install the "Firebug" add-on, then follow these fantastic instructions:

It gives "videos from Youtube" as an example, but the same applies to any other content you might find in a webpage.

share|improve this answer

I am having the same problem as the OP for a long time. At least since 2011 youtube changed the way its videos are cached and since then its hard to find them. The old way it used to be stored on the regular Windows Temp folder on the Windows use folder. Sometimes, I don't know when, you can indeed find it there, for that I usually use this really lightweight freeware called VideoCacheView because it searches all IE and windows related folders really quick and can copy those nasty 'locked', in use files with just a right click instead of me having to use the command line with hobocopy tool. I tried to search the Firefox cache and it was no good. My guess is youtube is using some nonstandard Flash cache method, probably on the Flash cache folder itself but I only found that folder once or twice, shouldnt be hard though.

share|improve this answer
Can you link to source for this information or better yet to definitive answer? – Lizz Feb 25 '13 at 12:18

One of the easiest ways to download streaming videos from any site containing it, is passing the url to jdownloader. There are some addons like Flash Video Downloader too. I've maid a simple script (I'm a learner) for linux to cache pictures and videos (but doesn't work with firefox unless I start a download with Flash Video Downloader first):

share|improve this answer

if you are using win XP I think it should be found in the temp folder, just write %temp% in the address bar then there should be a file which its name contains "fla" and had a reasonable size (depends on the opened video). the problem is that you can not copy the file because you will get an error stats the file is being used... and soon after you close Firefox the file will be disappeared. So what to do? to solve this problem you should switch your user and log off the user from another user using task manger. then com back and copy the file and change the extension from .tmp to .flv then open the file. I know that km player can read the file.

share|improve this answer

It copies the file despite the process being in use:

share|improve this answer
Welcome to Super User! Please quote the essential parts of the answer from the reference link(s), as the answer can become invalid if the linked page(s) change. – DavidPostill Jun 1 '15 at 22:26

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .