Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Search Support

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

PDF Editor options are unusable (grayed out)

  • 2 replies
  • 2 have this problem
  • 277 views
  • Last reply by RxF

more options

I'm trying to use the built-in PDF Editor features after finding out about it but every PDF file I open with Firefox has the options grayed out (as shown in the screenshot). What should I do to re-enable the features?

I'm trying to use the built-in PDF Editor features after finding out about it but every PDF file I open with Firefox has the options grayed out (as shown in the screenshot). What should I do to re-enable the features?
Attached screenshots

Chosen solution

I checked that it is set to the true but pdfjs.annotationEditorMode is modified to be 1 instead of 0. Switching it back to 0 made it work again, thanks for pointing me in the right direction!

Read this answer in context 👍 0

All Replies (2)

more options

Enter about:config in the address bar and check if pdfjs.enableHighlightEditor = true.

(bug 1867513)

Modified by TyDraniu

more options

Chosen Solution

I checked that it is set to the true but pdfjs.annotationEditorMode is modified to be 1 instead of 0. Switching it back to 0 made it work again, thanks for pointing me in the right direction!