<all_urls>
Yomitan 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
Yomitan 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.
declarativeNetRequest
Yomitan 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.
scripting
Yomitan needs to inject content
scripts and stylesheets into webpages in order to properly display the
search popup.
offscreen
(Chrome only)
Yomitan uses
this permission to create a secondary backend document that has DOM
access, given that Manifest v3 service workers do not. Service workers
can then reach out to out to this document in order to complete actions
that require access to DOM APIs, such as any that require clipboard
access.
clipboardWrite
Yomitan supports simulating the
Ctrl+C
(copy to clipboard) keyboard shortcut when a
definitions popup is open and focused.
clipboardRead
(optional)
Yomitan
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 Yomitan to support scanning
text from external applications, provided there is a way to copy text
from those applications to the clipboard.
nativeMessaging
(optional, unavailable on
Firefox for Android)
Yomitan 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.