TypeError: value is not a non-null object 503
Hi Every time I open Nightly a small window opens saying ( TypeError: value is not a non-null object 503) Then I press OK to the massage and Nightly opens. The problem is with the Facebook toolbar button but I never had the problem till a few weeks ago.
Thanks
Hi
Every time I open Nightly a small window opens saying ( TypeError: value is not a non-null object 503)
Then I press OK to the massage and Nightly opens.
The problem is with the Facebook toolbar button but I never had the problem till a few weeks ago.
Thanks
All Replies (1)
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
- Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
- Do NOT click the Reset button on the Safe Mode start window
- https://support.mozilla.org/kb/Safe+Mode
- https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
If there is a problem with an extension then you will have to wait for an update and disable the extension for now.