アドオン
ここで公開されている数千ものアドオンを試すには、無料の高速ウェブブラウザー Mozilla Firefox をダウンロードしましょう！
閉じる
![[警告]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=58a99cbb-667a0970)
許可設定
このアドオンについて
From Firefox 26, and from SeaMonkey 2.23, a website can store data for offline use without asking permission from the user.
This addon restores the alert when a website asks to store data for offline use.
For users who do not want to fiddle around with the hidden options of Firefox and SeaMonkey.
Disabling or removing this addon restores the default setting of these browsers.
This addon restores the alert when a website asks to store data for offline use.
For users who do not want to fiddle around with the hidden options of Firefox and SeaMonkey.
Disabling or removing this addon restores the default setting of these browsers.
