当サイトはユーザー体験を改善するためのメンテナンスを実施中に機能が制限される予定です。記事を読んでもあなたの問題が解決せず質問をしたい場合は、Twitter の @FirefoxSupport、Reddit の /r/firefox で、サポートコミュニティが皆さんを助けようと待機しています。

Mozilla サポートの検索

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

Clicking options gives me a page saying "address isn't valid", why?

  • 1 件の返信
  • 1 人がこの問題に困っています
  • 7 回表示
  • 最後の返信者: FredMcD

more options
      • It's asked on here already, but the one answer doesn't tell me why OR how to fix it.***

Every time I open FF, I get a dialog box that says Firefox isn't my default browser. I've disabled IE completely. I have no other internet program on my Windows 7 laptop.

Also, Going to "Tools", "Options", I get a page saying "address isn't valid". Also, entering "about:preferences#general<enter>" or "about:preferences#general" or "about:preferences" into the address bar gets me "address isn't valid" as well.

Any Ideas?

***It's asked on here already, but the one answer doesn't tell me why OR how to fix it.*** Every time I open FF, I get a dialog box that says Firefox isn't my default browser. I've disabled IE completely. I have no other internet program on my Windows 7 laptop. Also, Going to "Tools", "Options", I get a page saying "address isn't valid". Also, entering "about:preferences#general<enter>" or "about:preferences#general" or "about:preferences" into the address bar gets me "address isn't valid" as well. Any Ideas?

この投稿は Saiyuki53 により に変更されました

すべての返信 (1)

more options

Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link} Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder.
https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac Linux: Check your user manual.

Do Not remove the profiles folder.

Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder.

After rebooting the computer, run a registry scanner. Then run the installer. If all goes well, remove the OLD folders when you are done.


If there is a problem, start your Computer in safe mode and try again.

Starting The Computer In Safe Mode;
Free Online Encyclopedia