externally_connectable

Type Object
Mandatory No
Manifest version 2 or higher
Example
"externally_connectable": {
  "ids": [
    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
    "cccccccccccccccccccccccccccccccc"
  ],
  "matches": [
    "https://example1.com/*",
    "*://*.example2.com/*"
  ]
}

Externally connectable controls which other extensions and web pages can communicate with an extension using runtime.connect() and runtime.sendMessage() message passing. If externally_connectable is not specified, all extensions can communicate with each other but not with web pages.

Note: For communication with web pages:

"ids" attribute

ids enables communication between this extension and other installed extensions specified by extension identifiers. Use the pattern "*" to communicate with all extensions.

"matches" attribute

matches is a list of regular expressions that enables communication between an extension and the web pages that match the expression.

Note: If externally_connectable is not specified, communication among extensions is allowed as if externally_connectable specified {"ids": ["*"] }. Therefore, if you specify externally_connectable.matches, don't forget to add ids if you want to communicate with other extensions.

Browser compatibility

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desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Firefox for Android
Safari on iOS
externally_connectable

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Full support
Full support
Partial support
Partial support
No support
No support
See implementation notes.