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.

Search Support

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

firefox cannot install Video Download Helper,

  • 5 பதிலளிப்புகள்
  • 24 இந்த பிரச்னைகள் உள்ளது
  • 4 views
  • Last reply by rooster1957

after downloading video download helper,firefox asks to install now,when i do it tells me it,firefox,cannot install

after downloading video download helper,firefox asks to install now,when i do it tells me it,firefox,cannot install

தீர்வு தேர்ந்தெடுக்கப்பட்டது

thank you FredMcD deleting the files you suggested has solved the problem. agan,thanks mate

Read this answer in context 👍 4

All Replies (5)

I have it on my system. No problem. Contact it's support site.

Your user agent shows that you run Firefox in compatibility mode for Windows 95 (NT 4.0).

Check that you do not run Firefox in compatibility mode. You can open the Properties of the Firefox desktop shortcut via the right-click context menu and check the "Compatibility" tab. Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

cor-el said

Your user agent shows that you run Firefox in compatibility mode for Windows 95 (NT 4.0). Check that you do not run Firefox in compatibility mode. You can open the Properties of the Firefox desktop shortcut via the right-click context menu and check the "Compatibility" tab. Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

still no joy.the following always pops up after clicking install now Video Download Helper could not be installed because Firefox cannot modify the needed file.thanks anyways

Does it say what file?

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":

தீர்வு தேர்ந்தெடுக்கப்பட்டது

thank you FredMcD deleting the files you suggested has solved the problem. agan,thanks mate