Comparing to the previous Firefox guides, this could be an easier 3-minutes guide about how to save (YouTube) flash video, shockwave game, mp3, movie, music, picture, etc from Firefox cache folder.
Using YouTube video as example, let’s see how could we save a copy of “Gwen Stefani – What You Waiting For?” from the Firefox cache folder:
- Wait for the flash video loading completely, i.e. able to play MTV to the end
- Open a new tab / window of Firefox and enter
about:cacheas an URL
- Take note of the Firefox cache folder path specified in Cache Directory: and browse to this folder with Windows Explorer
If the Storage In Use greater than or approaching Maximum Storage Size, the video might not be cached completely or you’ll have to increase Maximum Storage Size and reload the MTV again.
To set Firefox cache folder maximum storage size, click Tools | Option… | Network | Cache
- Sort the cached files by file size and try to open the biggest file with Storm Codec-MPC or FlV Player. (The biggest file is likely to be the cached YouTube video)
OK. If you want to know what those files in the Firefox cache folder exactly are, here we go:
- While in the
about:cachepage, click the List Cache Entries link of the Disk cache device section
- Press CTRL + F to search for Key: (URL) with the
get_videokeyword and also with the biggest Data Size: (YouTube doesn’t cache the flash video in FLV extension. For other flash video hosting site, you may save time by trying to search for .FLV extension).
- Right-click the URL and select the Open Link In New Tab and refer to the File on Disk:
P/S: There are many Firefox plugins available to save flash video. However, if you’re not regularly download flash video, then it’s worth to know how to do it manually. Running too many plugins might slow down the Firefox or overall PC performance too 
source: http://www.walkernews.net/2007/11/19/how-to-save-flash-video-from-firefox-cache-folder/
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Posted by Mohammad on January 17, 2009 at 9:37 pm
This is just a Great Tip.
Posted by Mimi on February 23, 2009 at 3:48 am
I have a *much* better solution that works for me for some websites showing quicktime .mov files. I just open the web page source in firefox (ctrl+U), look for the link for the .mov file (doesnot matter if I dont know the name, I just copy the entire link for the .mov file). Now just download the file any which way you can! I use ‘downloadthemall’ firefox plugin.
Posted by Anonymous on October 9, 2012 at 7:08 am
Loads of thanks. It works like a charm. Very simple..
Posted by alap1983 on May 10, 2009 at 10:28 am
Thanks Man It worked
I was depending on the IE for this. Now I can work in Firefox
Cool
Posted by Washington on June 28, 2009 at 1:39 am
Firefox, Opera, IE.. whatever, it’s possible to download any flv file.
Posted by JohnXY on October 23, 2009 at 7:37 am
I’m gonna use this one for sure.
Till now I was using http://www.tubeleecher.com
Posted by GVJeremy on October 23, 2009 at 7:39 am
wow great method .
Till now I was using http://www.tubeleecher.com
Posted by JohnXY on October 23, 2009 at 7:53 am
yep great method .
Till now I was using http://www.tubeleecher.com
Posted by me on November 7, 2009 at 2:32 pm
about: cache
The url is not valid and cannot be loaded.
Posted by me on November 7, 2009 at 2:35 pm
Oh, I removed the space and it worked… about:cache
Posted by badrra on December 4, 2009 at 9:02 am
This one is by far the best solution.
http://badrra.wordpress.com/category/firefox
Posted by windows mobile 7 on March 11, 2010 at 8:02 pm
thanks for the tip
Posted by G. Ravinder on March 15, 2010 at 6:13 pm
This post is not working.
Try the below one
C:\Documents and Settings\%currents user%\Local Settings\Application Data\Mozilla\Firefox\Profiles\2ai338p4.default\Cache
arrange file view to details
and sort them by size descending
if videos drag them to VLC player and if photos them drag them to IExplore or any image viewer
!!enjoy friends!!
this works 100%
Posted by G. Ravinder on March 15, 2010 at 6:14 pm
This post is not working.
Try the below one
C:\Documents and Settings\%currents user%\Local Settings\Application Data\Mozilla\Firefox\Profiles\2ai338p4.default\Cache
arrange file view to details
and sort them by size descending
if videos drag them to VLC player and if photos them drag them to IExplore or any image viewer
!!enjoy friends!
this works 100%
Posted by Pinetop Rentals on June 18, 2010 at 12:40 am
Thanks for sharing this article… I really appreciate it!
Pinetop Rentals
Posted by yousavetube on July 27, 2010 at 9:35 pm
if it happen to you that you want to save and play video from youtube.com on your local pc, try this link http://www.yousavetube.com/
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Posted by Website Design Delhi on August 19, 2010 at 2:23 pm
Hey Great Tutorial!
I thought i need any software to download it from any website but i have done it using firefox in few clicks!
Thanks
Posted by The Gadget Show - Page 16 on November 2, 2010 at 11:10 am
[...] [...]
Posted by miguel@hotmail.com on March 28, 2011 at 12:00 pm
Hi,
Would this work for other sites like youku, tudou, or 56.com?
Posted by deez on May 11, 2011 at 11:46 pm
Any way for downloading a MTV video from firefox 4 and mac osx?
Posted by Indie on June 21, 2011 at 12:22 am
Came across this on Google while looking for something similar myself as firefox keeps deleting the files when they’re done. Not keen on installing extra junk when not needed and had an idea. Under Linux you can set immutable flag on the file once it’s started to be downloaded and the firefox can’t delete the damn thing. You can then make a copy of it.
Posted by Anonymous on September 18, 2011 at 2:25 pm
but it wan’t work on firfeox v 6 ….the cache have been change so what else u can do
Posted by yuji_sai@yahoo.com on September 18, 2011 at 2:30 pm
but it wan’t work on firefox v6.02…. went u search it u will find many folder and not the cache like before
Posted by Leonardo Ciaccio on October 29, 2011 at 7:10 pm
Hello, I would recommend this extension for Chrome http://grabanymedia.altervista.org/ translated into English, Italian, French, German, Portuguese
Posted by Anonymous on March 9, 2012 at 6:53 am
it doesnt work in firefox 10
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graphic design blog
to improve myself, and share my experiences
use ‘to’, instead of ‘for’
Posted by zhag on March 13, 2012 at 11:06 am
This does NOT work. The largest file ALWAYS stays black when I open it with flv player.
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Posted by Alane Jewel on October 3, 2012 at 3:09 am
This helped me: http://www.real.com/resources/download-convert-flv
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While it isn’t the best troubleshooting solution for all software problems, it seems to do a bang up job at fixing missing or corrupt DLLs and other files. As you select, keep an eye on the bar above the files.