Fire Page Editing Firefox

Fire Page Editing

Inject HTML, CSS or JavaScript into any web-page. The changes you make are applied everytime you visit the specified website(s).

Features & Capabilities

**It is based on Page Manipulator browser extension - https://github.com/Ruud14/Page-Manipulator **

**Using the Ace editor with default keyboard shortcuts [here](https://github.com/ajaxorg/ace/wiki/Default-Keyboard-Shortcuts) **

WARNING: This extension works on most sites, but there are some exceptions! If you'd like to see any specific improvements or found any bugs, let me know [here](https://mediamaster.eu/contatti).

Browser Extension to inject HTML, CSS or JavaScript into any web-page. Inject HTML, CSS or JavaScript into your favorite web-pages. Have the changes you make be saved and applied every time you visit the specified website(s).

Better than 'inspect element' because It will stay after reloading the page.

How to install?

Firefox:

Install it from the Firefox extension store [here](https://addons.mozilla.org/it/firefox/addon/fire-agilitypage/).

How to use?

  • Simple, First open the extension.

  • Choose 'JavaScript', 'CSS' or 'HTML'.

  • Create a new file by pressing 'new'.

  • Write your own code.

  • Press the 'Manipulate' button to test your code.

  • To make sure your code is run every time you visit a specific website do the following:

    • Put the URLs of the websites in the 'active websites' textarea.
    • Check the 'active' checkbox.
    • Reload the page to make sure it works.
  • Button functionalities:

    • The 'Reload' Button:
      • Will reload the current page.
    • The 'Active' checkbox:
      • on > The code will be run automatically on the pages specified in the 'Active websites' textarea.
      • off > The code will only run when you press the 'Manipulate' button.
    • The 'Active Websites' textarea:
      • You can specify the websites you want your code to run on here.
    • The 'Matching Pages' dropdown:
      • 'Exact' > The code will only run when the URL of the page is exactly the same as one of the URLs in the 'Active Websites' textarea. (Including slashes at the end!)
      • 'Recursive' > The code will also run on all sub-URLs of the specified URLs in the 'Active Websites'.
    • The 'Position on page' dropdown (HTML only):
      • 'Top' > The HTML will be added to the top of the page.
      • 'Bottom' > The HTML will be added to the bottom of the page.
      • 'Replace' > The html will replace the entire body HTML of the page.
    • The 'Manipulate' or 'Update Manip.' button:
      • Injects the code into the page or updates the injection.
      • This button also works when the 'Active' checkbox is unchecked.
    • The 'Remove Manip.' Button:
      • Removes the manipulation from the page.
      • If the "Auto ⟳" checkbox is checked, the page will automatically reload after pressing the 'Remove Manip.' button. The 'active' checkbox will also be unchecked.
    • The 'Delete' button:
      • Deletes the current file from the extension storage.
  • You can right click any element on a page to get the css path of that element.

Features

  • Automatically inject custom HTML, CSS and/or Javascript every time you visit one of the websites you specified.
  • Run custom CSS Before the page is fully loaded so you won't see the original page first.
  • Inject Javascript on the go.
  • Add/Remove/Change the HTML and CSS on the go.
  • Right click on any element on a page to get the full CSS path.
  • Automatically saves the changes you make.

It doesn't work, what now?:

  • If the extension button in the top right corner is greyed-out, you can't use it on that page.

  • Make sure the 'active' checkbox is checked. And the 'active websites' input contains the correct URLs.

  • For Javascript:

    • Make sure your code is run at the right moment. Maybe try adding a delay.
    • Check the browser console for error messages.
  • For CSS:

  • For HTML:

    • Make sure you haven't accidentally set the 'position' dropdown to the wrong position.

The editor used since the second release is Ace editor. Check it out here: https://ace.c9.io/

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Francesco De Stefano
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/fire-agilitypage/
Email:
ul*****@mediamaster.eu
Website:
https://sourceforge.net/projects/fire-page-editing/

Permission Change History

2022-09-27: Version 1.5.0 → 2.0
Add Permissions: storage contextMenus unlimitedStorage

User Reviews

by Ka*****, 2026-03-04

This add-on does not seem to work with the most recent version of firefox. Even if it did, the lack of a feature to replace specific elements on the HTML document itself would've still not made it great as an add-on. Apparently, you can only add your own html code at the top of the document, at the bottom of the document or replace the whole document with your code which is far from ideal, assuming it even worked to begin with. You would rather stick to a script manager or a stylesheet manager instead of this add-on.
by Fi*****, 2025-06-08
View all user reviews ›

Is Fire Page Editing Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Fire Page Editing requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Fire Page Editing is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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