PDF Editor
Firefox includes a free, built-in PDF editor so you can work with PDF files right in your browser. Instead of downloading another app or signing up for an online PDF editor, just open a PDF document in Firefox, use simple editing tools to make changes, and save the edited PDF back to your computer.
How to edit PDF files in Firefox
With Firefox, you don’t need separate PDF tools or a standalone PDF reader to handle everyday PDF editing. Getting started with PDF editing in Firefox is simple:
- Open the PDF file in Firefox (drag it into a tab or use File → Open)
- Choose an editing tool:
- Edit PDF content by adding text, images, highlights, and comments
- Fill out a PDF form or a fillable form using clearly labeled form fields
- Sign PDF documents with a stored signature
- Review and annotate pages when you edit review PDFs for work or school
- Click on the PDF page where you want to add or adjust content
- When you’re done, download the edited PDF to save your changes
You get a modern, focused PDF workflow that lives inside the browser you already use.
Fill in forms online without printing and scanning
Need to fill out a rental application, a real estate disclosure, or a school form? You can complete most PDF forms in Firefox without printing or scanning.
- Type directly into form fields so your PDF text is clear and readable
- Add extra text anywhere on the PDF page if the original form fields are missing
- Create and reuse a signature so you can sign PDF documents in just a few clicks
When you’re done editing, download the edited PDF and email the file — no printer, scanner, or third-party online PDF editor required.
Add text
Open the PDF in Firefox. Click the Text button to choose a color and text size before selecting where in the document you wish to add text. It's that easy!
Add drawings
Open the PDF in Firefox. Click the Draw icon to choose a color, thickness, and opacity before being able to draw on the document.
Add image with alt text
Open the PDF in Firefox. Click the image icon, which will then prompt you to upload an image. Adjust the size and placement of your image as needed. Click the "+Alt text" button on the image to add a photo description to make your PDF more accessible.
Create a reusable signature
Open the PDF in Firefox. Click the signature icon and then click "Add new signature". Choose between Type, Draw or Image, and click the Add button to insert. You can also save your signatures and use them again later.
Create a highlight
Open the PDF in Firefox. Select the text you want to highlight, then click the highlight icon that appears below your selection, or right-click to find the highlight option in the context menu. Click the icon in the top right to freehand highlight sections of the PDF.
Add comments
Open the PDF in Firefox. Create a highlight, then click the Comment icon that appears below your selection, type your comment, and click Add to save. Lots of comments in a PDF? Click the Comment icon in the top right to open the sidebar and jump to the one you need.
Do more with Firefox
Get a free, built-in PDF editor along with privacy-first browsing, powerful add-ons, and smart features that help you do more in Firefox with every document.
PDF editor FAQs
Can I convert PDFs without Acrobat?
Yes. You don’t need Adobe Acrobat to convert PDF files. Many office suites and browsers can open a PDF document and export it as a Word document, and there are standalone pdf converter tools if you need advanced layout control.
Do I need to download anything extra to edit PDFs in Firefox?
No. The PDF editor is a built-in feature of Firefox. Just open a PDF file and start editing. There’s no additional free download or plugin required.
Can I use Firefox PDF Editor for work documents?
Yes. Firefox is useful for a wide range of documents, from school assignments to contracts and real estate forms. For highly regulated workflows or complex automation, you can still pair Firefox with dedicated PDF tools and services, but for everyday form filling, PDF editing, and quick annotations, Firefox is often all you need.
