Firefox add-on with keyword - css 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.

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

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

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

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 .

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.

Create and edit PDF files with PDF editor online

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

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

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

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.

Create and edit Word Doc documents

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

Check and editing the image maps inside the web page with magnifying glass.

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

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

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

Display JSON objects by transforming them into Syntax editable highlighted HTML

Online editor support for Tampermonkey's userscripts

Create and edit PowerPoint PPT slides

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