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

When I try to install download helper I am told to restart firefox. I do, and go back to the same "restart firefox" message.

  • 1 reply
  • 2 have this problem
  • 1 view
  • Last reply by cor-el

more options

I have tried to install "download helper" as a Firefox add-on. I hit the install button, but then get a box telling me to restart firefox. I do, but end up at the same page with the same "restart firefox" message everytime I try to install "download helper."

I have tried to install "download helper" as a Firefox add-on. I hit the install button, but then get a box telling me to restart firefox. I do, but end up at the same page with the same "restart firefox" message everytime I try to install "download helper."

All Replies (1)

more options

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

Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) 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, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is a compatibility update available.


See also: