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.

Avatar for Username

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

Wo archive tread sia. Meɖekuku bia biabia yeye ne ehia kpeɖeŋu.

Error logging into FB - Reference Error: FB is not defined

  • 1 ŋuɖoɖo
  • 0 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ cor-el

tprotani
tprotani
more options

When I try to login to Facebook to access one of my games, I get the error message above on Firefox, 109.0.1 (64-bit) running on Windows 10. This application recently started asking for the FB login. I do not get this error message using Chrome, but there are other issues with Chrome. I had been running the game just fine until recently.

I don't know what changed and whether the problem is with Facebook or the link between Facebook and Firefox. Any help would be appreciated. Thanks in advance.

When I try to login to Facebook to access one of my games, I get the error message above on Firefox, 109.0.1 (64-bit) running on Windows 10. This application recently started asking for the FB login. I do not get this error message using Chrome, but there are other issues with Chrome. I had been running the game just fine until recently. I don't know what changed and whether the problem is with Facebook or the link between Facebook and Firefox. Any help would be appreciated. Thanks in advance.
Screen ƒe photowo kpe ɖe eŋu

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can check for issues with Total Cookie Protection.

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages about blocked content.

You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings).

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window