Provide more detail on matching all URLs.

diff --git a/README.md b/README.md
index 16a6f6e83b82506a85d6c98a29e83e5f72d88b00..e997e52029d8fdf260513edfa9c6d75c4d33f2f0 100644 (file)
--- a/README.md
+++ b/README.md
@@ -5451,6 +5451,10 @@ Value (string):
 Block websites from being visited. The parameters take an array of Match Patterns, as documented in https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Match_patterns.
 The arrays are limited to 1000 entries each.
 
+If you want to block all URLs, you can use `<all_urls>` or `*://*/*`. You can't have just a `*` on the right side.
+
+For specific protocols, use `https://*/*` or `http://*/*`.
+
 As of Firefox 83 and Firefox ESR 78.5, file URLs are supported.
 
 **Compatibility:** Firefox 60, Firefox ESR 60\