Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Learn More

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

When opening Youtube, I get a window with message "Error: Div is null". How can this be solved?

  • 6 antwurd
  • 518 hawwe dit probleem
  • 8 werjeftes
  • Lêste antwurd fan ehoagland66

Canigia
Canigia
more options

I don't know when it happend first, but when I open a video on youtube with Firefox 6.xx, I always get a window (title "Javascript Application") with the message "Error: Div is null".

I tried upgrading to FF 7.xx beta, and also 'downgrading' to FF 5.xx again, but the error still appears. When I disable Javascript, the error doesn't appear, but this workaround can't be the solution.

I don't know when it happend first, but when I open a video on youtube with Firefox 6.xx, I always get a window (title "Javascript Application") with the message "Error: Div is null". I tried upgrading to FF 7.xx beta, and also 'downgrading' to FF 5.xx again, but the error still appears. When I disable Javascript, the error doesn't appear, but this workaround can't be the solution.

Alle antwurden (6)

kguz111593
kguz111593
more options

The fix is to uninstall Firefox completely [First, back up your bookmarks]. The error is caused by an add-on. If you get the Div Null you're unlikely able to open your add-on manager to remove any. When you uninstall the program, make sure to check to delete all your bookmarks and personal data. Then reinstall Firefox and the problem is fixed :)

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

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

  • Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
  • Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
jasper85
jasper85
more options

Start in Safe mode with all add-ons & extensions disabled. Try youtube, if ok check for a Youtube download helper or mp3 helper. I removed this and Youtube then worked fine.

jaronbarends
jaronbarends
more options

I fixed this by disabling the YouTube MP3 Downloadhelper plugin.

LeonNicanor
LeonNicanor
more options

I had the same issue, removed that addon and problem solved. No need to uninstall

ehoagland66
ehoagland66
more options

I got rid of this problem by disabling the addon:

Easy YouTube MP3 Downloader 1.7 by Kaaj

Link to the addon page: http://tinyurl.com/77k6j7u

There are several GOOD YouTube downloaders available. Make sure this is the one you have before you disable it.

running: CometBird 7.0.1 alternative to Firefox (but is uses the same engine--in fact everything is the same as Firefox, but with a different name, and built-in support for the BitComet client without using an addon after they stopped development on the addon itself--I guess they did this to start pimping their own web browser. Whatever... it does seem to eat up less RAM, though.)

Bewurke troch ehoagland66 op