diff --git a/index.ts b/index.ts
index 389c866..0aab4d3 100644
--- a/index.ts
+++ b/index.ts
@@ -27,5 +27,9 @@ function getRawRegex(matchPattern: string): string {
 }
 
 export function patternToRegex(...matchPatterns: readonly string[]): RegExp {
+	if (matchPatterns.includes('<all_urls>')) {
+		return /^(https?|file|ftp):[/]+/;
+	}
+
 	return new RegExp(matchPatterns.map(getRawRegex).join('|'));
 }
diff --git a/test.js b/test.js
index ae43b61..38d0d74 100644
--- a/test.js
+++ b/test.js
@@ -47,6 +47,15 @@ map.set('*://mail.google.com/*', [
 	'https://mail.google.com/foobar',
 ]);
 
+map.set('<all_urls>', [
+	'http://mail.google.com/foo/baz/bar',
+	'https://mail.google.com/foobar',
+	'file:///foo/bar.html',
+	'file:///foo',
+	'http://bfred.it',
+	'ftp://example.com',
+]);
+
 for (const [pattern, urls] of map) {
 	test(macro, pattern, urls);
 }