Hello,

As part of the latest stable release of Firefox, 137.0, the ability to add digital signatures is included with your basic Firefox PDF Viewer. To sign a document online, open the PDF with Firefox and click the Signing tool on the top right of the viewer (attached in images). You will be prompted to "Add (a) new signature", and have the choice to either type, draw, or import an image of your signature. Once finished, the signature will be appended to your document, and you are free to move and scale it. Firefox will remember your signature for future use, but you can delete it if you want.

If you do not see this icon, I advise you to check for new Firefox updates, or check the Firefox add-ons store for an alternative. The feature is part of a "progressive roll-out", and it is possible you may not see it yet. Let us know if you need help with anything else!

Cheers,

Hello

This additional information https://support.mozilla.org/en-US/questions/1503822#answer-1723439

If you do not see this icon

For information purposes 1 - Go to Configuration Editor for Firefox https://support.mozilla.org/en-US/kb/about-config-editor-firefox 2 - Enter a search term pdfjs.enableSignatureEditor To change a boolean (true-false) preference's value, double-click on the preference. Alternatively, you can click the Toggle button. Restart Firefox