Firefox add-on with keyword - editor

Edit the contents of a web page prior to printing or saving. Elements in the web page can be edited, formatted, hidden or deleted. Unwanted content, such as adverts and sidebars, can easily be removed.

Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.

Photo Editor & Search provides a photo editing tool via the favicon on the toolbar along with web search results by Yahoo®.

Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests

Create and edit PDF files with PDF editor online

Create and edit Excel XLS spreadsheets. Excel XLS Editor is an extension that allows to create, edit and view any Microsoft Excel document in both XLS and XLSX format. It also handles the standard Open Office format ODS.

Powered by the Monaco Editor, it provides support for basic syntax colorization, IntelliSense, validation and Diff Editor features.

Edit the every web page you want !! .... Making your own custom web page , using any other web page is just a click away !!! You can convert any web page into an editable document , which can then be edited and saved .

A free, highly customizable text and code editor for your browser.

Solve all your PDF editing and conversion needs with this free All-in-One online PDF tool.

Edit cookies related to the current page and all its sub-frames right from a popup

Easily view and edit cookies for any website via toolbar popup!

A JSON Editor Extension based on the amazing JSON Editor Online https://github.com/josdejong/svelte-jsoneditor Source code: https://github.com/fractalf/json-editor-ex

PDFOffice, a PDF editor to create and edit any PDF file using a web browser.

A free & easy-to-use word editor extension for your browser.

Create and edit Word Doc documents

Display JSON objects by transforming them into Syntax editable highlighted HTML

A powerful picture editor, edit and save pictures online, can modify text,Image Text,Image Watermark,Rotate,Filter,Crop,Flip,Color.

Add, edit, copy, remove, export and import local- and session- storage data

Create and edit documents with LibreOffice Online.

Create and edit PowerPoint PPT slides

WebStudio, a HTML editor online to create and edit any webpage using a web browser.

Live preview of CSS/Less/Sass code changes. Auto-save file, autocomplete, convert Less/Sass to CSS, beautify, minify, CSS reloader, linter, ...

This editor is used to display and check your HTML and CSS code easily. Just click on the this Extension Icon on the toolbar and it will open the Editor in the New tab. This will save the time of the Front end Developers.

EDITS ANY PAGE! Good for pranking and trolling your friends! A very funny addon.