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What does (JavaScript Application) Error: TypeError. JSON stringify is not a function, mean and how do I stop it popping up.

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Several times a day I get the message '(JavaScript Application)

Error: TypeError. JSON stringify is not a function' popping up - how do I stop it?

Several times a day I get the message '(JavaScript Application) Error: TypeError. JSON stringify is not a function' popping up - how do I stop it?

Additional System Details

Installed Plug-ins

  • npsitesafety
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.5
  • GEPlugin
  • RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
  • RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
  • RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
  • RealDownloader Plugin
  • Google Update
  • Shockwave Flash 11.5 r502
  • iTunes Detector Plug-in
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 10.9.2 for Mozilla browsers
  • Nitro PDF Plug-in for Firefox and Chrome
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • 5.1.10411.0
  • Picasa plugin
  • NPWLPG
  • E-centives Coupon Activator
  • CANON iMAGE GATEWAY Album Plugin Utility Module
  • Zeon PDF Plugin For Mozilla
  • Coupons, Inc. Coupon Printer Plugin
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • np-mswmp
  • Office Plugin for Netscape Navigator
  • Macromedia Shockwave for Director Netscape plug-in, version 10.1
  • Macromedia Authorware Web Player Netscape plug-in, version 2004

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.0; rv:18.0) Gecko/20100101 Firefox/18.0

More Information

salim.karacaoglan 0 solutions 2 answers

Helpful Reply

Hi! Does this problem appear on many different sites or just one?

Hi! Does this problem appear on many different sites or just one?
cor-el
  • Top 10 Contributor
  • Moderator
13037 solutions 119382 answers

Helpful Reply

Do you get this error reproducible on specific web pages?

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 or otherwise make changes.
Do you get this error reproducible on specific web pages? Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> 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 or otherwise make changes. *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Question owner

It always appears when I start the computer and, occasionally at other times.

It always appears when I start the computer and, occasionally at other times.
philipwatling 0 solutions 10 answers

I get that error message whenever I open a new window. I click OK and everything works fine, but nothing works till I click OK. I can live with it, but it's very annoying :(

Worse is the fact that when I open the Add-ons manager I cannot see any of my extensions or get any new ones, the Get Add-ons page continually saying Loading...

Appearance, Plugins and Dictionaries work fine.

I get that error message whenever I open a new window. I click OK and everything works fine, but nothing works till I click OK. I can live with it, but it's very annoying :( Worse is the fact that when I open the Add-ons manager I cannot see any of my extensions or get any new ones, the Get Add-ons page continually saying Loading... Appearance, Plugins and Dictionaries work fine.
philipp
  • Top 10 Contributor
  • Moderator
3275 solutions 15074 answers

this sounds like the files in your profile folder that store the information about your extensions might have become corrupted. please go to firefox > help > troubleshooting information > profile - show folder... then windows explorer should open up your profile folder. in there look for the files named extensions.ini, extensions.sqlite, extensions.sqlite-journal (and in some cases also extensions.txt, extensions.rdf). delete or rename those files and quit firefox, they will be regenerated the next time you launch firefox.

also see Corrupt extension files

this sounds like the files in your [[Profiles|profile folder]] that store the information about your extensions might have become corrupted. please go to ''firefox > help > troubleshooting information > profile - show folder...'' then windows explorer should open up your profile folder. in there look for the files named extensions.ini, extensions.sqlite, extensions.sqlite-journal (and in some cases also extensions.txt, extensions.rdf). delete or rename those files and quit firefox, they will be regenerated the next time you launch firefox. also see [https://support.mozilla.org/en-US/kb/Unable%20to%20install%20add-ons#w_corrupt-extension-files Corrupt extension files]
philipwatling 0 solutions 10 answers

So far so good, thank you very much. I was even able to find an update to an extension which is not compatible with my FireFox update :)

I still get the stringify error though :(

So far so good, thank you very much. I was even able to find an update to an extension which is not compatible with my FireFox update :) I still get the stringify error though :(
philipwatling 0 solutions 10 answers

P.S. In my History tab, any idea why Recently Closed Tabs and Recently Closed Windows do not show anything?

P.S. In my History tab, any idea why Recently Closed Tabs and Recently Closed Windows do not show anything?
cor-el
  • Top 10 Contributor
  • Moderator
13037 solutions 119382 answers

Make sure that you do not run Firefox in (permanent) Private Browsing mode.

  • Tools > Options > Privacy > Cookies > Firefox will: "Use custom settings for history"
  • Deselect: [ ] "Always use private browsing mode"

Also check that session restore is enabled.

Make sure that you do not run Firefox in (permanent) Private Browsing mode. *https://support.mozilla.org/kb/Private+Browsing *Tools > Options > Privacy > Cookies > Firefox will: "Use custom settings for history" *Deselect: [ ] "Always use private browsing mode" Also check that session restore is enabled. *http://kb.mozillazine.org/Session_Restore *https://support.mozilla.org/kb/restore-previous-session
philipwatling 0 solutions 10 answers

I never use private browsing, though I double-checked. Likewise session restore is set up, as one might expect. Still no joy :(

I never use private browsing, though I double-checked. Likewise session restore is set up, as one might expect. Still no joy :(
cor-el
  • Top 10 Contributor
  • Moderator
13037 solutions 119382 answers

Quote: P.S. In my History tab, any idea why Recently Closed Tabs and Recently Closed Windows do not show anything?

Is this only happening if you close and restart Firefox or reboot the computer or also when you close a tab or window?

Quote: ''P.S. In my History tab, any idea why Recently Closed Tabs and Recently Closed Windows do not show anything? '' Is this only happening if you close and restart Firefox or reboot the computer or also when you close a tab or window?
philipwatling 0 solutions 10 answers

It's funny you say that, as I always log off the PC without exiting FireFox. In the old days closing FF first used to reset everything so I got into the habit of logging off with it still open. Today I had to close it to install a program and now my history works fine :)

It's funny you say that, as I always log off the PC without exiting FireFox. In the old days closing FF first used to reset everything so I got into the habit of logging off with it still open. Today I had to close it to install a program and now my history works fine :)
philipwatling 0 solutions 10 answers

Dare I say that this problem has disappeared?

Dare I say that this problem has disappeared?