Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Mozilla サポートの検索

サポート詐欺に注意してください。 私たちはあなたに通話やショートメッセージの送信、個人情報の共有を求めることはありません。疑わしい行為を見つけたら「迷惑行為を報告」からご報告ください。

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。
Solved アーカイブに保管済み

"Unable to connect" to remote pages ("Could not read chrome manifest file"); local pages OK; proxy set to none -- what to do?

gordonbr replied
gordonbr

Firefox 5.0.1, claims to be up to date (how did it know that if it couldn't connect to the Web?), Windows XP Home 2002 SP3 on Dell DIM3000 Pentium 4, 3 GHz, 1 GB Ram.

Internet Explorer (8.0.6001.18702 with 128-bit cipher) and Opera (10.2? can't get it to display its version) can both access all local and remote (Web) pages -- Firefox does fine with all local pages but can't connect to anything remote.

Firefox 5.0.1, claims to be up to date (how did it know that if it couldn't connect to the Web?), Windows XP Home 2002 SP3 on Dell DIM3000 Pentium 4, 3 GHz, 1 GB Ram. Internet Explorer (8.0.6001.18702 with 128-bit cipher) and Opera (10.2? can't get it to display its version) can both access all local and remote (Web) pages -- Firefox does fine with all local pages but can't connect to anything remote.

すべての返信 (2)

選ばれた解決策

A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See:

Yes, the Firewall was the issue. I had already stumbled upon that, but thanks anyway.