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Modify Headers
A Firefox add-on that allows you to modify HTTP request header...
Show Page Headers
Display the HTTP headers of the currently open page in a new tab or window...
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Modify Headers for SeaMonkey
A SeaMonkey add-on that adds, modifies and filters HTTP request headers...
Objective-C++ Preprocessor Headers
Standalone header files that can be included in any project to extend Objective-C's syntax...
Headers Toggle for ThunderBird
A ThunderBird add-on that adds a keyboard shortcut to toggle between different header display...
toggle header Thunderbird extension Thunderbird header toggle
Live HTTP Headers
A Firefox add-on that allows you to see HTTP headers....
Toggle Compose Headers for Thunderbird
A ThunderBird add-on that allows you to hide or, on the contrary, to "unhide" headers in compose window...
Live HTTP Headers for SeaMonkey
A SeaMonkey add-on that helps you view the HTTP headers of a page even when you are browsing...
View Headers Toggle Button for ThunderBird
View Headers Toggle Button for ThunderBird - ThunderBird add-on that places a button on the toolbar to easily toggle viewing....
RapidWeaver Clear MegaTheme
RapidWeaver Clear MegaTheme - RWT...
theme Rapidweaver RapidWaever theme Clear theme different headers