Highlight Text in PDF on Firefox
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Highlight Text in PDF on Firefox
Browser-based PDF tools for highlighting in Firefox
or drag and drop a file
Supports PDF and image file formats (maximum 100MB)
By using the product, you agree to our Terms of Service and have read our Privacy Policy.
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Frequently Asked Questions
Highlight Text in PDF on Firefox opens PDFs online so you can mark passages, edit text, and fill forms without extensions. It keeps the workflow inside Firefox, handy when you manage multiple tabs or profiles.
You get stable formatting, color-coded highlights, and quick comments while working across research articles, policies, or class handouts directly in Firefox.
Upload PDFs or images up to about 100MB, highlight and annotate, adjust text blocks, and keep layout intact before downloading.
Yes. Fill interactive form fields or add text boxes on static forms, then save or share straight from the Firefox tab.
Use yellow or custom-color highlights, sticky comments, callouts, and strikethroughs. Keyboard shortcuts (Cmd/Ctrl + F) help you jump to sections to annotate faster in Firefox.