Firefox add-on with keyword - header

Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.

Read ePub files right in Firefox. No additional software needed!

Read out loud the current web-page article with one click. Supports 40+ languages.

Advanced Feed Reader - Read news & blogs or any RSS/Atom/RDF source.

Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.

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

Displays the HTTP header. Edit it and send it.

Add, modify or remove a header for any request on desired domains.

This extension allows you quickly to set the X-Forwarded-For HTTP Header

An easy-to-use tab reloader with custom reloading time settings for individual tabs

A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.

Download videos from the web. Easy, smart, no tracking.

Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.

HTTP Header Spy enables you to inspect request- response headers and cookies right after page load with no extra clicks.

The extension rewrite the header (request or response) based on a rules table. It 's possible to add, modify or remove header fields for a choosen url pattern. It's possible to import/export the configuration

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HTTP Header Mangler inserts HTTP headers on a per host basis.

add header This add-on would add custom header to HTTP requests. We can add headers to all requests or specific request for certain sites.

Displays the live log with the http requests headers

Removes the X-Frame-Options header from all responses.

HeaderTools is a versatile and user-friendly extension designed to provide users the capability to manipulate and inject request headers based on regex domain selectors.

Adds a context menu item to send PDF links directly to a PDF viewer like Adobe Acrobat Reader

Sets Akamai Pragma Request Headers on all requests for enhanced troubleshooting.

Reader is the ultimate Reader tool for Firefox.

mHeaderControl is a Firefox Plugin which provides features to manipulates HTTP headers of requests. Individual features can be turned on globally or on a per page basis.