Firefoxブラウザへのセキュリティ証明書の手動インストール

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This article is about AdGuard for Android, a multifunctional ad blocker that protects your device at the system level. To see how it works, download the AdGuard app

Firefoxのバージョンによって、AdGuardがHTTPS フィルタリングを実行するために必要なアプローチが異なります。 セキュリティ証明書をブラウザ自体に直接インストールすることができない場合（主に79.0以降のFirefoxバージョンで発生し、今後のバージョンでMozillaに対応してもらいたい状況です）、下の「対策①」をお試しください。 それも効かなければ、手間かかりますがFIrefox全バージョンに対応するはずの「対策②」をお試しください。

【対策①】

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この方法は、Android版Firefoxのバージョン90.0以降で動作します。

Firefox (およびそれをベースにしたブラウザ) がAdGuard証明書を信頼できるようにするには、以下を行ってください:

1. Run the browser.

2. Go to Settings → About Firefox.

   

3. Tap the Firefox logo five times.

4. Navigate to Settings → Secret Settings.

   

5. Toggle Use third party CA certificates.

【対策②】

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This method will only work on rooted devices.

1. Install and configure ADB; On the Windows platform, Samsung owners may need to install this utility.

2. Activate the developer mode and enable USB debugging:

   • Open the Settings app on your phone;
   • Go to System section (last item in the settings menu). In this section, find the sub-item About phone;
   • Tap the Build number line 7 times. After that, you will receive a notification that You are now a developer (If necessary, enter an unlock code for the device);
   • Open System Settings → Developer Options → Scroll down and enable USB debugging → Confirm debugging is enabled in the window Allow USB debugging after reading the warning carefully.

3. Install the Firefox browser (release version);

4. Open the AdGuard settings (gear icon in the bottom right corner) → Filtering → Network → HTTPS filtering → Security certificate → Instructions for Firefox → Install for old versions;

5. Open the folder data/data/org.mozilla.firefox/files/mozilla using adb shell su and cd data/data/..., then browse to the folder named xxxxxxx.default and memorize its name;

6. In the specified folder we are interested in two files:

   • cert9.db
   • key4.db

7. We need to move these files to a folder of the browser where the security certificate issue occurred:

   • data/data/org.mozilla.<browser_name>/files/mozilla/yyyyyy.default.

8. The full command will look like this:

   • adb shell su
   • cp -R data/data/org.mozilla.firefox/files/mozilla/xxxxxxxxxx.default/cert9.db data/data/org.mozilla.<browser_name>/files/mozilla/yyyyyyyyyy.default
   • cp -R data/data/org.mozilla.firefox/files/mozilla/xxxxxxxxxx.default/key4.db data/data/org.mozilla.<browser_name>/files/mozilla/yyyyyyyyyy.default

   In case you received the system notification permission denied, you should first move the specified files to the permission-free directory. And after that you should move them to the necessary folder in your Firefox browser.

   The full command should look something like this:

   • adb shell su
   • cp -R data/data/org.mozilla.firefox/files/mozilla/xxxxxxxx.default/cert9.db sdcard/Download
   • cp -R data/data/org.mozilla.firefox/files/mozilla/xxxxxxxxx.default/key4.db sdcard/Download
   • cp -R sdcard/Download/cert9.db data/data/org.mozilla.<browser_name>/files/mozilla/yyyyyyyyyy.default
   • cp -R sdcard/Download/key4.db data/data/org.mozilla.<browser_name>/files/mozilla/yyyyyyyyyy.default

   If adb shell su does not work, you should try adb shell initially, and then su.