FAQ#

Why is "header name" reduced to lowercase?#

RFC 2616 says:

Each header field consists of a name followed by a colon (":") and the field value. Field names are case-insensitive.

So, since 4.0.0, Header Editor will reduce "header name" to lowercase. Except for custom functions: the custom function will still get the original header (except that it has been modified by other rules)

Can I delete a header in a simple way?#

Yes, just modify it to _header_editor_remove_

Rules disappear#

As we know, the rules will disappear or not work

Note: Before doing all of the following, please back up your Chrome/Firefox profile folder!

Not work in Private Mode#

Popup panel and management page is not work in Private Mode of Firefox. But the main features are available

Chrome#

• Open chrome://extensions/?id=eningockdidmgiojffjmkdblpjocbhgh, enable "Enabled in incognito mode"

Firefox#

• Open about:debugging, find the Internal UUID of Header Editor (e.g. d52e1cf2-22e5-448d-a882-e68f3211fa76).
• Open Firefox options.
• Go to Privacy & Security.
• Set History mode to "Use custom settings".
• Click "Exceptions".
• Paste our URL: moz-extension://{Internal UUID}/ (the {Internal UUID} is the Internal UUID of Header Editor you found in step one), for example, moz-extension://d52e1cf2-22e5-448d-a882-e68f3211fa76/, Then click 'Allow'.
• Click "Save Changes".

Rules automatically deleted in Firefox#

Thanks to Thorin-Oakenpants and henshin

• Open about:config, make sure that dom.indexedDB.enabled is true
• Try to change extensions.webextensions.keepUuidOnUninstall into true, is your problem solved?
• Open your Firefox profile folder, if there are many files (about a thousand or more) named prefs-xxxx.js files with 0 bytes, closed firefox and deleted them.

Other questions?#

Just submit a issue