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。

Avatar for Username

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。

Firefox sometimes doesn't launch

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

MartyJames
MartyJames
more options

Firefox usually launches OK, but about a third of the time, it just doesn't launch at all. I can see the program running in the Task Manager, but the profile manager never appears (as it normally would) and nothing happens. If I end the Firefox process and relaunch it, it still never launches. Only a restart seems to fix it.

This has been happening for a few months now, usually when my computer has been on for a while. My system has been a little slow lately and I might have thought it was a system problem, however, Firefox is the only program that seems to have any problem launching.

I don't know if it's related, but Firefox has also been very slow connecting to websites lately, with the connection often dropping out for maybe 5 minutes at a time. I know there's nothing wrong with my actual connection because all other internet-based applications work fine and never slow down.

Firefox 91, Windows 7 x64

Firefox usually launches OK, but about a third of the time, it just doesn't launch at all. I can see the program running in the Task Manager, but the profile manager never appears (as it normally would) and nothing happens. If I end the Firefox process and relaunch it, it still never launches. Only a restart seems to fix it. This has been happening for a few months now, usually when my computer has been on for a while. My system has been a little slow lately and I might have thought it was a system problem, however, Firefox is the only program that seems to have any problem launching. I don't know if it's related, but Firefox has also been very slow connecting to websites lately, with the connection often dropping out for maybe 5 minutes at a time. I know there's nothing wrong with my actual connection because all other internet-based applications work fine and never slow down. Firefox 91, Windows 7 x64

この投稿は MartyJames により に変更されました

すべての返信 (3)

FredMcD
FredMcD
more options

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

Install both 32-bit and 64-bit "Visual Studio 2015, 2017 and 2019" downloads, (x86: vc_redist.x86.exe and x64: vc_redist.x64.exe) from https://support.microsoft.com/help/2977003/the-latest-supported-visual-c-downloads

MartyJames
MartyJames 質問者
more options

Thank you sir. That is good advice, but it is not causing my particular problem as Firefox runs perfectly fine most of the time, just sometimes it doesn't.

FredMcD
FredMcD
more options

What were you doing at the time? surfing, watching a clip, reading something . . . .


Start Firefox using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?