We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

ابحث في الدعم

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

Spellcheck chokes on textareas with a lot of content

  • 2 (ردّان اثنان)
  • 1 has this problem
  • 5 views
  • آخر ردّ كتبه avalyn11

more options

Since upgrading to 3.6.10 (used on Windows 7 x64), Firefox's spellcheck stops working after a certain point in textareas that contain a lot of text, such as on Wikipedia article edit mode (among others). Spellcheck will work and underline incorrectly-spelled words for a portion of the text, usually less than half, but it'll just stop underlining anything after a seemingly arbitrary point. I can't recall this happening in any version prior to 3.6.10.

Since upgrading to 3.6.10 (used on Windows 7 x64), Firefox's spellcheck stops working after a certain point in textareas that contain a lot of text, such as on Wikipedia article edit mode (among others). Spellcheck will work and underline incorrectly-spelled words for a portion of the text, usually less than half, but it'll just stop underlining anything after a seemingly arbitrary point. I can't recall this happening in any version prior to 3.6.10.

All Replies (2)

more options

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

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems


You can also check the value of the pref extensions.spellcheck.inline.max-misspellings on the about:config page to see that it is still the default (500).

To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.

more options

I switched to the default theme and set extensions.spellcheck.inline.max-misspellings to 5000 (it had been at 500). This appears to have solved the problem. Thank you!