Match patterns in extension manifests

Match patterns are a way to specify groups of URLs: a match pattern matches a specific set of URLs. They are for extensions using WebExtensions APIs in a few places, most notably to specify which documents to load content scripts into, and to specify which URLs to add webRequest listeners to.

APIs that use match patterns usually accept a list of match patterns, and will perform the appropriate action if the URL matches any of the patterns. See, for example, the content_scripts key in manifest.json.

Match pattern structure

Note: Some browsers don’t support certain schemes.
Check the Browser compatibility table for details.

All match patterns are specified as strings. Apart from the special "<all_urls>" pattern, match patterns consist of three parts: scheme, host, and path. The scheme and host are separated by "://".

<scheme>://<host><path>

scheme

The scheme component may take one of two forms:

Form	Matches
"*"	Only "http" and "https" and in some browsers also "ws" and "wss".
One of "http", "https", "ws", "wss", "ftp", "ftps", "data" or "file".	Only the given scheme.

host

The host component may take one of three forms:

Form	Matches
"*"	Any host.
"*." followed by part of the hostname.	The given host and any of its subdomains.
A complete hostname, without wildcards.	Only the given host.

host must not include a port number.

host is optional only if the scheme is "file".

Note that the wildcard may only appear at the start.

path

The path component must begin with a "/".

After that, it may subsequently contain any combination of the "*" wildcard and any of the characters that are allowed in URL paths. Unlike host, the path component may contain the "*" wildcard in the middle or at the end, and the "*" wildcard may appear more than once.

<all_urls>

The special value "<all_urls>" matches all URLs under any of the supported schemes: that is "http", "https", "ws", "wss", "ftp", "data", and "file".

Examples

Pattern Example matches Example non-matches

Pattern	Example matches	Example non-matches
`<all_urls>` Match all URLs.	`http://example.org/` `https://a.org/some/path/` `ws://sockets.somewhere.org/` `wss://ws.example.com/stuff/` `ftp://files.somewhere.org/` `ftps://files.somewhere.org/`	`resource://a/b/c/` (unsupported scheme)
`:///*` Match all HTTP, HTTPS and WebSocket URLs.	`http://example.org/` `https://a.org/some/path/` `ws://sockets.somewhere.org/` `wss://ws.example.com/stuff/`	`ftp://ftp.example.org/` (unmatched scheme) `ftps://ftp.example.org/` (unmatched scheme) `file:///a/` (unmatched scheme)
`://.mozilla.org/*` Match all HTTP, HTTPS and WebSocket URLs that are hosted at "mozilla.org" or one of its subdomains.	`http://mozilla.org/` `https://mozilla.org/` `http://a.mozilla.org/` `http://a.b.mozilla.org/` `https://b.mozilla.org/path/` `ws://ws.mozilla.org/` `wss://secure.mozilla.org/something`	`ftp://mozilla.org/` (unmatched scheme) `http://mozilla.com/` (unmatched host) `http://firefox.org/` (unmatched host)
`*://mozilla.org/` Match all HTTP, HTTPS and WebSocket URLs that are hosted at exactly "mozilla.org/".	`http://mozilla.org/` `https://mozilla.org/` `ws://mozilla.org/` `wss://mozilla.org/`	`ftp://mozilla.org/` (unmatched scheme) `http://a.mozilla.org/` (unmatched host) `http://mozilla.org/a` (unmatched path)
`ftp://mozilla.org/` Match only "ftp://mozilla.org/".	`ftp://mozilla.org`	`http://mozilla.org/` (unmatched scheme) `ftp://sub.mozilla.org/` (unmatched host) `ftp://mozilla.org/path` (unmatched path)
`https://*/path` Match HTTPS URLs on any host, whose path is "path".	`https://mozilla.org/path` `https://a.mozilla.org/path` `https://something.com/path`	`http://mozilla.org/path` (unmatched scheme) `https://mozilla.org/path/` (unmatched path) `https://mozilla.org/a` (unmatched path) `https://mozilla.org/` (unmatched path)
`https://*/path/` Match HTTPS URLs on any host, whose path is "path/".	`https://mozilla.org/path/` `https://a.mozilla.org/path/` `https://something.com/path`/	`http://mozilla.org/path/` (unmatched scheme) `https://mozilla.org/path` (unmatched path) `https://mozilla.org/a` (unmatched path) `https://mozilla.org/` (unmatched path)
`https://mozilla.org/*` Match HTTPS URLs only at "mozilla.org", with any path.	`https://mozilla.org/` `https://mozilla.org/path` `https://mozilla.org/another` `https://mozilla.org/path/to/doc`	`http://mozilla.org/path` (unmatched scheme) `https://mozilla.com/path` (unmatched host)
`https://mozilla.org/a/b/c/` Match only this URL.	`https://mozilla.org/a/b/c/`	Anything else.
`https://mozilla.org//b//` Match HTTPS URLs hosted on "mozilla.org", whose path contains a component "b" somewhere in the middle.	`https://mozilla.org/a/b/c/` `https://mozilla.org/d/b/f/` `https://mozilla.org/a/b/c/d/`	`https://mozilla.org/b/*/` (unmatched path) `https://mozilla.org/a/b/` (unmatched path)
`file:///blah/*` Match any FILE URL whose path begins with "blah".	`file:///blah/` `file:///blah/bleh`	`file:///bleh/` (unmatched path)

<all_urls>

Match all URLs.

http://example.org/

https://a.org/some/path/

ws://sockets.somewhere.org/

wss://ws.example.com/stuff/

ftp://files.somewhere.org/

ftps://files.somewhere.org/

resource://a/b/c/
(unsupported scheme)

*://*/*

Match all HTTP, HTTPS and WebSocket URLs.

http://example.org/

https://a.org/some/path/

ws://sockets.somewhere.org/

wss://ws.example.com/stuff/

ftp://ftp.example.org/
(unmatched scheme)

ftps://ftp.example.org/
(unmatched scheme)

file:///a/
(unmatched scheme)

*://*.mozilla.org/*

Match all HTTP, HTTPS and WebSocket URLs that are hosted at "mozilla.org" or one of its subdomains.

http://mozilla.org/

https://mozilla.org/

http://a.mozilla.org/

http://a.b.mozilla.org/

https://b.mozilla.org/path/

ws://ws.mozilla.org/

wss://secure.mozilla.org/something

ftp://mozilla.org/
(unmatched scheme)

http://mozilla.com/
(unmatched host)

http://firefox.org/
(unmatched host)

*://mozilla.org/

Match all HTTP, HTTPS and WebSocket URLs that are hosted at exactly "mozilla.org/".

http://mozilla.org/

https://mozilla.org/

ws://mozilla.org/

wss://mozilla.org/

ftp://mozilla.org/
(unmatched scheme)

http://a.mozilla.org/
(unmatched host)

http://mozilla.org/a
(unmatched path)

ftp://mozilla.org/

Match only "ftp://mozilla.org/".

ftp://mozilla.org

http://mozilla.org/
(unmatched scheme)

ftp://sub.mozilla.org/
(unmatched host)

ftp://mozilla.org/path
(unmatched path)

https://*/path

Match HTTPS URLs on any host, whose path is "path".

https://mozilla.org/path

https://a.mozilla.org/path

https://something.com/path

http://mozilla.org/path
(unmatched scheme)

https://mozilla.org/path/
(unmatched path)

https://mozilla.org/a
(unmatched path)

https://mozilla.org/
(unmatched path)

https://*/path/

Match HTTPS URLs on any host, whose path is "path/".

https://mozilla.org/path/

https://a.mozilla.org/path/

https://something.com/path/

http://mozilla.org/path/
(unmatched scheme)

https://mozilla.org/path
(unmatched path)

https://mozilla.org/a
(unmatched path)

https://mozilla.org/
(unmatched path)

https://mozilla.org/*

Match HTTPS URLs only at "mozilla.org", with any path.

https://mozilla.org/

https://mozilla.org/path

https://mozilla.org/another

https://mozilla.org/path/to/doc

http://mozilla.org/path
(unmatched scheme)

https://mozilla.com/path
(unmatched host)

https://mozilla.org/a/b/c/

Match only this URL.

https://mozilla.org/a/b/c/

Anything else.

https://mozilla.org/*/b/*/

Match HTTPS URLs hosted on "mozilla.org", whose path contains a component "b" somewhere in the middle.

https://mozilla.org/a/b/c/

https://mozilla.org/d/b/f/

https://mozilla.org/a/b/c/d/

https://mozilla.org/b/*/
(unmatched path)

https://mozilla.org/a/b/
(unmatched path)

file:///blah/*

Match any FILE URL whose path begins with "blah".

file:///blah/

file:///blah/bleh

file:///bleh/
(unmatched path)

Invalid match patterns

Invalid pattern	Reason
`resource://path/`	Unsupported scheme.
`https://mozilla.org`	No path.
`https://mozilla.*.org/`	"*" in host must be at the start.
`https://*zilla.org/`	"*" in host must be the only character or be followed by ".".
`http*://mozilla.org/`	"*" in scheme must be the only character.
`https://mozilla.org:80/`	Host must not include a port number.
`://`	Empty path: this should be "`:///*`".
`file://*`	Empty path: this should be "`file:///*`".

Browser compatibility

scheme

Update compatibility data on GitHub

	Desktop				Mobile
	Chrome	Edge	Firefox	Opera	Firefox for Android
Wildcard `*` scheme	Chrome Full support Yes	Edge Full support 14	Firefox Full support 48	Opera Full support Yes	Firefox Android Full support 48
`*` matches `ws` and `wss`	Chrome No support No	Edge ?	Firefox Full support 55	Opera No support No	Firefox Android Full support 55
`http`	Chrome Full support Yes	Edge Full support 14	Firefox Full support 48	Opera Full support Yes	Firefox Android Full support 48
`https`	Chrome Full support Yes	Edge Full support 14	Firefox Full support 48	Opera Full support Yes	Firefox Android Full support 48
`ws`	Chrome No support No	Edge ?	Firefox Full support 55	Opera No support No	Firefox Android Full support 55
`wss`	Chrome No support No	Edge ?	Firefox Full support 55	Opera No support No	Firefox Android Full support 55
`ftp`	Chrome Full support Yes	Edge Full support 14	Firefox Full support 48	Opera Full support Yes	Firefox Android Full support 48
`ftps`	Chrome No support No	Edge No support No	Firefox No support No Notes No support No Notes Notes See bug 1463440	Opera No support No	Firefox Android No support No Notes No support No Notes Notes See bug 1463440
`file`	Chrome Full support Yes	Edge Full support 14	Firefox Full support 48	Opera Full support Yes	Firefox Android Full support 48
`data`	Chrome No support No	Edge ?	Firefox Partial support 48 Notes Partial support 48 Notes Notes Doesn’t support injection of content scripts or stylesheets.	Opera No support No	Firefox Android Partial support 48 Notes Partial support 48 Notes Notes Doesn’t support injection of content scripts or stylesheets.

Legend

Full support: Full support
Partial support: Partial support
No support: No support
Compatibility unknown: Compatibility unknown
See implementation notes.: See implementation notes.

Match patterns in extension manifests

Match pattern structure

scheme

host

path

<all_urls>

Examples

Invalid match patterns

Browser compatibility

scheme

Legend

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