Firefox’s built-in PDF annotation tool

CanLuthien — Sun, 23 Nov 2025 12:04:01 GMT

I use Firefox’s built-in “Annotate PDF” feature extensively for school and work, and I’ve run into a limitation that makes the tool difficult to use for any detailed handwriting or sketching.

Right now, every pen stroke becomes a fixed object as soon as I change color or click away. Once that happens, I can’t draw inside, over, or continue the stroke as part of the same drawing. This breaks the natural flow of annotating a document, especially when trying to make layered notes, corrections, or detailed diagrams.

A few improvements would make a significant difference:

Allow continuing a stroke after clicking out instead of freezing it as an isolated object.
Add more flexible stroke editing or a basic layer system so handwriting behaves naturally.
Make color changes smoother without finalizing the previous stroke.

These changes would greatly improve the PDF annotation workflow and make Firefox far more practical for users who rely on in-browser document markup.

I’m sharing this to see if others experience the same issue and to request that the development team consider these improvements for future updates.

Re: Firefox’s built-in PDF annotation tool

siffemcon — Sun, 23 Nov 2025 23:34:27 GMT

You could file a bug for that at https://bugzilla.mozilla.org/enter_bug.cgi/.

Re: Firefox’s built-in PDF annotation tool

Jon — Mon, 24 Nov 2025 09:27:35 GMT

Thanks @CanLuthien for the feedback! Will be sure to share this with the team.

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Firefox’s built-in PDF annotation tool

Re: Firefox’s built-in PDF annotation tool

Re: Firefox’s built-in PDF annotation tool