Yomichan Permissions

<all_urls>

Yomichan requires access to all URLs in order to run scripts to scan text and show the definitions popup, request audio for playback and download, and connect with Anki.

storage and unlimitedStorage

Yomichan uses storage permissions in order to save extension settings and dictionary data. unlimitedStorage is used to help prevent web browsers from unexpectedly deleting dictionary data.

webRequest and webRequestBlocking

Yomichan uses these permissions to ensure certain requests have valid and secure headers. This sometimes involves removing or changing the Origin request header, as this can be used to fingerprint browser configuration.

Example: Origin:

declarativeNetRequest

Yomichan uses this permission to ensure certain requests have valid and secure headers. This sometimes involves removing or changing the Origin request header, as this can be used to fingerprint browser configuration.

Example: Origin:

scripting

Yomichan will sometimes need to inject stylesheets into webpages in order to properly display the search popup.

clipboardWrite

Yomichan supports simulating the Ctrl+C (copy to clipboard) keyboard shortcut when a definitions popup is open and focused.

clipboardRead (optional)

Yomichan supports automatically opening a search window when Japanese text is copied to the clipboard while the browser is running, depending on how certain settings are configured. This allows Yomichan to support scanning text from external applications, provided there is a way to copy text from those applications to the clipboard.

nativeMessaging (optional)

Yomichan has the ability to communicate with an optional native messaging component in order to support parsing large blocks of Japanese text using MeCab. The installation of this component is optional and is not included by default.

Allow in private windows (optional)

When enabled, Yomichan is able to scan text and show definitions in private/incognito web browser windows.

This option can be configured from the web browser's extension settings pages.

Allow access to file URLs (optional)

When enabled, Yomichan is able to scan text and show definitions on local HTML files located using the file://* scheme.

This option can be configured from the web browser's extension settings pages.