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PDF annotations in Firefox 106 - Give us your feedback!



I'm Romain from the product team. We just launched Firefox 106 that brings annotation capabilities to our pdf reader, built inside Firefox.

When pdf forms are not fill-able or when some quick notes are needed on pdf documents, you can now directly add text or draw on pdf documents before saving or sharing them.

How? See

I'd love to hear your thoughts on the feature to help us steer what's next for annotations on pdf documents.

Thanks for your participation!


Making moves

With the PDF tools, the character is freehand, so it would have been nice if you could make a nice straight line, and making is not that easy either, you have to find the right combination of opacity and color

Try Hypothesis annotator/highlighter if you want nice, clean highlighting. It's free, but you must download the annotation tool. More at

Making moves

So I'm not sure this is the right place to mention this but I have some major issues with 'fillable' pdf's on firefox. For instance, every fillable D&D character sheet works fine in edge, and the math works just fine, but in firefox, where having +5 dex should give me +5 to my AC (the math is basically ability mod (5) plus base AC(10)) but instead of 15 AC I end up with 5,010. Weird stuff. Would love to see that sort of issue ironed out so I can stop having to open Microsoft Edge for D&D night

Hi @Selinth can you please share a pdf document link and clarify which field specifically gets wrongly calculated?

It was from here: (the starfindersupercharactersheet.pdf) Basically if you go in and up your Dexterity ability score you'll see the modifier is calculated correctly (so for 20 dex the mod is +5) but it puts your EAC and KAC (energy and kinetic armor class respectively) to crazy numbers like 5010 and 150, when they both should be 15.

I filed a bug about it:

Don't hesitate to file a bug when you think something is wrong.

Making moves


I am very appreciative of this update to Firefox's built-in PDF reader, particularly as it borrows from Firefox's very user-friendly UI.

I am a high school teacher and use PDFs almost daily. Without access to professional PDF editing software, I largely rely on free PDF editors. There are some features that I would love to see implemented:

1) An "eyedropper" as part of color selection. This would help quickly match colours of fonts and background colors from the PDF.

2) A shape tool. It makes it quick and easy for me to cover up parts of the PDF that I don't want seen (even better when combined with the "eyedropper" to match background color).

3) "Save to PDF" ordered pages. To delete pages of a PDF, I "Print > Save to PDF > Custom Pages", and only type the pages I want to keep. Within this, if I type custom pages "2, 1" the document remains in order. If possible, it would be great if the order typed could be kept, allowing you to rearrange pages on a PDF in a newly saved document.

4) Merge PDF tool. To combine two or more PDFs together.


Many thanks and kind regards.

Making moves

The only thing missing for me to switch from Adobe Acrobat to the build in PDF editor in Firefox for quickly filling documents is a "safe signature" feature. I hate to draw ugly signatures with the touchpad of my laptop. Instead, I would love to be able to create a beautiful signature once (e.g., on my iPad), and then be able to safe it and in future just add it to documents like a stamp.

Making moves

I love the PDF-annotator. That´s a game changer. With the following feature, it would surely become my standard PDF-viewer:

- possibility to add pictures (.jpg) and scale them, i.e. a signature.

As a viewer it's fine, but when annotating the highlighting and comments are only for personal use -- they cannot be sent with the PDF doc. to others (or at least I could not do it...). For annotation, whether private or public, I still prefer the free Hypothesis.

Making moves

Bonjour Romain. 😉

It's already great to be able to add text and, secondarily, to draw lines freehand.
The way these annotations are implemented is excellent. Congratulations and thanks !
Also, they are perennial= displayed by other .pdf applications.

I'm embarrassed to suggest many additional implementations because I know it's a lot of work.
I'll just point out what I use every day with other software.

For the so-called annotations:
- highlighting;
- underlining;
- strike out text;
- drawing colored rectangles (around pieces of sentences to create titles);
- text as a reducible note ~post-it-like~ (rarely).

Beyond annotations:
- Page manipulation: rotation (possible already but only in display, not perennial), extraction (which can already be done by the "Print" function but without rearrangement), merging; insertion (which would be possible if a merge were feasible);
- Image insertion (including a signature image);
- digital signature;
- encryption;
- OCR;
- file size reduction.

If FF could provide these capabilities, or many of them, it would be super-great !

Currently, I use Okular KDE (excellent on many points) + PDFsam Basic (for page manipulation) + Foxit Reader (for image insertion) + NAPS2 (for OCR).
I have definitively abandoned Adobe applications that pollute, slow down systems, and cost exorbitant prices.