Four Options To Deal With Flash Cookies

Martin Brinkmann
Oct 25, 2009
Updated • Mar 9, 2013

Flash Cookies, which are also known as super cookies or Local Shared Objects, should not be confused with normal cookies that are placed by websites. Normal cookies can easily be deleted from within the web browser. Flash cookies on the other hand are much harder to come by. They can store more information than normal cookies and are used for advertisements, tracking and flash related information like high scores or video controls.

We explained Flash Cookies in detail back in 2007 when a larger group of Internet users became aware of them. More than two years have passed since then with Flash cookies still playing a major role on many popular web services and for many advertising agencies.

Here are four options to deal with Flash cookies:

Option 1: Adobe Flash Player Settings

Probably the best option to deal with Flash cookies is to open the Adobe Flash Player settings. Users can look at the stored Flash cookies, delete some or all and change several options that change or even block Flash cookies on the user system.

Option 2: The manual way

Flash Cookies are stored on the local computer system. Their location varies depending on the operating system. Flash cookies are stored as *.sol files in the operating system. Here are the locations they can usually be found in:

  • Windows: LSO files are stored typically with a “.SOL” extension, within each user’s Application Data directory, under Macromedia\Flash Player\#SharedObjects.
  • Mac OS X: For Web sites, ~/Library/Preferences/Macromedia/Flash Player. For AIR Applications, ~/Library/Preferences/[package name (ID) of your app].
  • GNU-Linux: ~/.macromedia, ~/.macromedia/Flash_Player/#SharedObjects, ~/.adobe

The process of deleting those flash cookies could be automated with the right software program, e.g. CCleaner for Windows.

Option 3: Firefox add-on Better Privacy

The Firefox add-on Better Privacy can delete Flash cookies regularly to get rid of them automatically with options to whitelist some Flash cookies that are needed, e.g. for storing high scores on your favorite gaming website or playback settings on Youtube.

better privacy flash cookies

Option 4: Flash Cookie Cleaner (Windows software)

Flash Cookie Cleaner is a software program for the Windows operating system. The portable software program can be used to delete all stored Flash cookies of the logged in user. It is available at the developer's website.

flash cookie cleaner


Previous Post: «
Next Post: «


  1. Data Recovery said on May 14, 2017 at 7:22 pm

    I agree .. But CCleaner must be used by a tech.

  2. Leah said on October 21, 2014 at 11:34 pm

    Two MORE years have passed by there still isn’t very much information about how to deal with ads following you everywhere you go. RETARGETING. Does that use Flash cookies too? How are you dealing with that? I don’t think they want us to know so if that’s the case, I’ll just do the opposite of whatever I would normally do. That should help – at least for awhile. Any other brilliant ideas?

  3. computer repair portland said on September 20, 2012 at 12:24 am

    I agree with others… CCleaner has worked best for us and our customers

  4. Joi Ror said on December 3, 2010 at 3:11 pm

    The best way to get rid of the files is to lock the “Flash Player” folder in the get info box. That way they don´t get stored in the first place.

  5. Zeph said on March 24, 2010 at 5:07 am

    @Gary -the link “Open” in the first line after option 1 seems to load flash player in option setting mode – the “illustration” there is not a screenshot, but a live embedded flash which allows you to clear your cookies or change settings.

  6. Gary said on March 22, 2010 at 9:28 am

    But nowhere do you say how to open flash player?
    This small point has got me stumped

  7. Mike J said on October 27, 2009 at 6:42 pm

    Thanks for bringing Flash Cookie Cleaner to my attention. I downloaded it (no install is needed) & spent a day comparing its findings to Better Privacy; they were the same whenever I checked.

    CCleaner does not remove flash cookies.

    1. Mike J said on November 26, 2009 at 5:01 pm

      Update: new version 2.26.1050 of CCleaner DOES remove Flash Cookies from Firefox’ cache ( presumably also from IE); Ff must be closed for this to work.

  8. Mony said on October 26, 2009 at 11:47 am

    Thanks for the information about flash cookies. I thought if I managed to delete using ‘clear history’ in tools then its ok. Very useful information.

  9. DanTe said on October 26, 2009 at 4:31 am

    I used CCleaner to remove flash cookies as well. But this Better Privacy add-on for Firefox is much better. I now don’t need to remember to run CCleaner. I don’t have CCleaner automatically run, because I just don’t like things to auto run on my PC’s OS.

  10. Forcen said on October 25, 2009 at 6:21 pm

    I use CCleaner to remove flash cookies.

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.