The most popular browser extension to modify headers

** What can ModHeader do?**
- Add/modify/remove request headers and response headers (you can use this to set X-Forwarded-For, Authorization, Access-Control-Allow-Origin: *)
- Modify individual cookies in Cookie request header / Set-Cookie response header
- Redirect URL with another
- Conditionally enable header modification based on URL and/or resource type
- Advanced filtering by tab, tab group, or window

** Why ModHeader **
- ModHeader is fast, efficient, and light-weight. You can quickly enable/disable header modification with just 1-2 clicks.
- ModHeader provides you with many convenient features that will help you increase your development velocity with the least amount of frictions. Check out the big list the features below!
- ModHeader is free to use, with a paid option to unlock even more features.

** ModHeader features **
- Add comments to header
- One-click "undo" if you made a mistake
- Support having multiple profiles with quick switching between profiles
- Export and import profile
- Easily share your profiles with others
- Customize autocomplete names and values
- Dark mode support
- Sorting headers and name, value, or comments
- Append value to existing request or response header
- Customizable profile badge
- Clone profile
- Cloud backup
...and more!!!

** What is new in 4.0.0 **
- Support enhanced cookie modification
- Replace tab lock with tab filter, along with tab group and window filter
- Support autocomplete customization
- Dark mode support
- Keyboard commands mapping
- Give users more controls over share profile URLs
- Profile search
- Paid subscription required for some of the newly introduced features. Most existing features should continue to work for free users.

** Older changelogs **
https://docs.modheader.com/whats-new/version-4.x

** Permissions **
ModHeader currently requires 5 permissions:
1, "webRequest"
2, "webRequestBlocking"
3, "<all_urls>"
4, "storage"
5, "contextMenus"

"webRequest" and "webRequestBlocking" are required in order for request headers modification to work. Because ModHeader doesn't know ahead of time which website the modification should apply to, it needs to request permissions for all URLs (3). "storage" permission is needed to save settings to the cloud. "contextMenus" is used to enable quick pause/unpause by right-clicking on the icon.

** User guide **
https://docs.modheader.com/

** Privacy Policy **
https://modheader.com/privacy

** Automation **
For Selenium WebDriver users, please try:
https://github.com/modheader/modheader_selenium

To find ModHeader on other browsers, visit modheader.com