This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ابحث في الدعم

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

MY flash video downloader add on dissappers . Every now and then i have to install that addon again and again.

  • 11 ردًا
  • 1 has this problem
  • 23 views
  • آخر ردّ كتبه FredMcD

more options

MY flash video downloader add on dissappers . Every now and then i have to install that addon again and again. I am using winxp on my PC. This addon uninstalls automatically every now and then i have to download and install the addon.

MY flash video downloader add on dissappers . Every now and then i have to install that addon again and again. I am using winxp on my PC. This addon uninstalls automatically every now and then i have to download and install the addon.

الحل المُختار

Type about:support in the address bar and press enter.

Under the page logo on the left side you will see Application Basics. Under this find Profile Folder. To it’s right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

Read this answer in context 👍 0

All Replies (11)

more options

What one are you using? There are many.

more options

Flash Video Downloader - YouTube HD Download [4K] 8.0.1 bypos1t1ve

more options

Flash Video Downloader {web link} Flash Video Downloader helps you to download any video (flv, mp4, HD) from YouTube-like, Facebook, Break, Metacafe and more in one click. You can download mp3, music (iPod), avi and more. Download Flash games. Download Helper.


Have you contacted its support site?


https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save

Note: Some software, like Advanced SystemCare with Surfing Protection, can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.

more options

It is possible that there is a problem with the file(s) that store the extensions registry.

Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

New files will be created when required.

See "Corrupt extension files":


If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.

If this hasn't helped then also delete possible addons.json and addons.sqlite files.

You can also check for problems with preferences.

more options

THANKS FOR YOUR HELP.. I'm not understanding what to do. If you dont mind please tell me the above things in step wise manner.

more options

الحل المُختار

Type about:support in the address bar and press enter.

Under the page logo on the left side you will see Application Basics. Under this find Profile Folder. To it’s right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

more options

CAN i ASK SOMETHING NOT RELATED TO MOZILLA??? Means i'm facing an issue with my win XP OS

more options

WELL i tried the above step u advised and i downloaded the addon again lets see if i face the issue again

more options

HEY HI MY FLASH VIDEO DOWN LOADER ADD-ON uninstalled itself again?? I did what u told me earlier

more options

Contact the support site for the add-on. And let us know what happens.