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I am getting an Exc in ev handl: TypeError: brw is undefined. This only happens in firefox. Chrome or IE is not affected.

  • 7 replies
  • 214 have this problem
  • 8 views
  • Last reply by ZoeysGrampa

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When I open or request a page by clicking on a link I get the Exc in ev handl: TypeError: brw is undefined message every time. Until I click on the ok button the page will not open. I also now have to copy and paste page addresses almost every time I open a new firefox page. This is not happening with other browsers.

When I open or request a page by clicking on a link I get the Exc in ev handl: TypeError: brw is undefined message every time. Until I click on the ok button the page will not open. I also now have to copy and paste page addresses almost every time I open a new firefox page. This is not happening with other browsers.

All Replies (7)

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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).

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Your suggestions helped the original problem (at least for awhile) but now I have a new problem. I shot several short video clips today but have a problem trying to play them back. The first one plays OK but then the second one results in the following error: C:\Users\IrvNsf\Videos\2011-09-05 Ferries, etc. 110905\Ferries, etc. 110905 010.MOV That is followed on the next line by: Server execution failed.

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I encounter this problem whenever I have the Delicious Bookmarks add-on installed. If you have that add-on installed, try uninstalling it and see if that corrects the problem for you also. That add-on doesn't seem to play well with others and also causes conflicts with add-ons such as Session Manager.

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This started happening to me immediately after the last update in FF. I'm going to see if I can go back to the previous version. It started I think maybe 2 weeks ago. I should have thought FF would have addressed this by now.

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Disable "McAfee Site Advisor" extension which was just updated to 3.4.0, which probably took it out of the addons block list.

  • "Ctrl+Shift+A" > find McAfee Site Advisor and use "Disable", and then restart Firefox.
  • Do a Google Search no problem
  • It seems that if you re-enable Site Advisor again, and restart Firefox you are okay. At least you know where to look if you get the error again or Google searches slow down.
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This fixed the problem. I disabled all of the addons and reenabled the ones needed for my use. Thank You

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Thanks Cor-el. It worked perfectly.