Home
Functionality index

Your browser is more powerful than you think: Protect PDF From Editing in Mozilla Firefox For Free

Drop document here to upload

Select from device

Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT

Note: Integration described on this webpage may temporarily not be available.

0

Forms filled

0

Forms signed

0

Forms sent

Discover the simplicity of processing PDFs online

Upload your document in seconds

Fill out, edit, or eSign your PDF hassle-free

Download, export, or share your edited file instantly

Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support

Every PDF tool you need to get documents
done paper-free

Create & edit PDFs

Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.

Fill out & sign PDF forms

Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.

Organize & convert PDFs

Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.

Collect data and approvals

Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.

Export documents with ease

Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.

Store documents safely

Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.

Customer trust by the numbers

64M+

users worldwide

4.6/5

average user rating

4M

PDFs edited per month

9 min

average to create and edit a PDF

Join 64+ million people using paperless workflows to drive productivity and cut costs

Start free trial

Why choose our PDF solution?

Cloud-native PDF editor

Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.

Top-rated for ease of use

Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.

Industry-leading customer service

Enjoy peace of mind with an award-winning customer support team always within reach.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:

Read more reviews

I begrudgingly brought the product thinking it was too expensive and the online terms were confusing. However, after using it, I love it! I actually use it frequently now and don't know how I got along without it. Great product!

wanda

2016-02-16

I don't need legal documents very often & purchased to help a friend get through a difficult time. much better than hand writing all of the documents out. makes it look professional and I will probably use in the future as well, if needed.

Jannett C

2016-09-22

I am delighted that I found this PDF filler own line. I tried Adobe; however, I could not understand how it works. This is simple and easy to use. It is not difficult to drag and drop a file and then begin to fill in the proper document.

Thomas R

2017-02-25

Simple and versatile. Since it is new "technology" for me, I must use it with some guidance to understand all its utility, so the tutorials that are included will be handy without having to go to school to learn it.

Michael M

2018-04-22

Honestly- it is not straigth forward tool- you need to spend time and learn how to use it so it is not exceptionally user friendly. I found SignNow very complex!

ana

2019-05-03

What do you like best?
This program is user friendly. Very easy to use with icons and symbols that make to simple to navigate and get the document filled in, saved, emailed or printed very easily. I highly recommend this program for any size business that has PDF documents to fill out
What do you dislike?
There is nothing to dislike. I will say the steps to print. Really nothing to dislike.
What problems are you solving with the product? What benefits have you realized?
Professional documents being filled out and my associates really appreciate this.

User in Construction

2019-01-28

I had some troubles purchasing my subscription after my free trial and had a long wait using the chat feature. However, I called into the customer support line and had immediate amazing customer service in resolving my issue. My customer service rep was very detail in listening to my concerns and offering resolution. Because of the excellent customer service experience my PDfFiller representative delivered I proceeded with a one-year commitment of service and recommended these services to my family member.

Rebecca J

2024-10-11

Love the features and tools Pdf filler has been a great tool for me. I often use to complete documents and send them for my disable uncle. As a software engineer myself, I'm always amazed at some of the cool feature's and tools.. -Mike G from Florida

Michael Gidron

2022-08-29

Excellent service I had signed up and not cancelled the subscription properly, so I was charged for something I will never used. Jumped on chat, which is usually awful, not a bot, a human, who liked my jokes. Refunded no quibble. If I ever need a pdf filler I will definitely sign up.

Lynsey Thornthwaite

2021-10-30

Protect PDF From Editing in Mozilla Firefox with a professional editor

People tend to have different sets of tools for document management for many tasks, not to mention the feature to Protect PDF From Editing in Mozilla Firefox. For instance, they might employ one program to convert files, another one for editing them, and the third one for eSigning. Therefore, instead of completing a simple task in 5-10 minutes, time is spent switching from one tool to another.

pdfFiller is a time saver for individuals and businesses alike. Simply speaking, time saving equals money saving. Stop using multiple solutionsat once and take advantage of one, holistic PDF editing tool. Choosing pdfFiller is actually choosing sleek document workflows and convenience.

What's the difference between our platform and our competitors? Take a look at the list below to learn more:

01

Legally-binding eSignature. Certify documents and send them for signing without leaving the workplace.

02

Document layout. Reorder pages, add new, and rotate or delete existing ones with the Rearrange option.

03

Additional authentication requests. Ask a recipient to attach their photo or confirm their identity with a phone number or social profile.

04

Extra capabilities. Access multiple professional tools for editing text and adding new objects online at once.

05

Editing tool. Make significant changes to documents by using the Rewrite option that allows to modify a massive amount of information.

06

Interactive elements. Simplify the process of collecting data by inserting customizable fillable fields, checkboxes, and dropdown menus.

With pdfFiller, you don't have to update your software or hardware. You also get an extensive cloud storage for your files as a package deal; pdfFiller allows users to Protect PDF From Editing in Mozilla Firefox without installing any additional programs. All you need for work is a browser and a stable connection to the internet. Without a paper routine and the need for printing, manual filling, and signing, you don't need to worry about the expenses related to them either. Go paperless with pdfFiller and boost the way you deal with PDFs!

Protect PDF From Editing Feature in Mozilla Firefox

The Protect PDF From Editing feature in Mozilla Firefox enables users to safeguard their PDF documents from unauthorized changes. This tool ensures that your important files remain intact and private. Whether you are sharing contracts, reports, or personal documents, maintaining the integrity of your content is crucial.

Key Features

Prevents any alterations to your PDF files

Easy to use with a straightforward interface

Compatible with various document formats

Simple integration with existing workflows

Strong encryption to enhance security

Potential Use Cases and Benefits

Protect sensitive business documents from tampering

Ensure the authenticity of legal contracts when shared

Block unauthorized edits to educational resources

Safeguard personal information in resumes and applications

Maintain consistency in branding materials

With this feature, you can confidently share your PDF files, knowing that they will remain unaltered. You no longer have to worry about anyone making unauthorized changes or misrepresenting your work. By providing robust protection, the Protect PDF From Editing feature allows you to focus on what matters most—your content.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

For pdfFiller’s FAQs

Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.

What if I have more questions?

Contact Support

Can Firefox handle PDF files?

Firefox includes a built-in PDF viewer to display PDF files inside the browser window.

How do I password protect a PDF in Firefox?

Open the PDF and choose Tools > Protection > Encrypt > Encrypt with Password 6. If you receive a prompt, click Yes to change the security. 7. Select Require A Password To Open The Document, then type the password in the corresponding field.

Can Firefox edit PDFs?

The PDF Viewer in Firefox doesn't allow for editing a PDF file, especially one that is online. To edit a PDF file you would need to download and save the PDF file and then use an external PDF application or editor to edit that file.

Video instructions on how to Protect PDF From Editing on Mozilla Firefox

Related features

List of extra features

#1 usability according to G2

Try the PDF solution that respects your time.

Start free trial Learn more on G2