Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Este site está com funcionalidades limitadas enquanto realizamos manutenção para melhorar sua experiência de uso. Se nenhum artigo resolver seu problema e você quiser fazer uma pergunta, nossa comunidade de suporte pode te ajudar em @FirefoxSupport no Twitter e /r/firefox no Reddit.

Pesquisar no site de suporte

Evite golpes de suporte. Nunca pedimos que você ligue ou envie uma mensagem de texto para um número de telefone, ou compartilhe informações pessoais. Denuncie atividades suspeitas usando a opção “Denunciar abuso”.

Saiba mais

Esta discussão foi arquivada. Faça uma nova pergunta se precisa de ajuda.

Firefox not responding. Have done all troubleshooting but still not working. It won't even open now. Help please.

  • 5 respostas
  • 1 tem este problema
  • 10 visualizações
  • Última resposta de Jenonnet

more options

Can anyone help please? I've tried everything suggested in the troubleshooting, have even uninstalled and re-installed it but it still isn't working. It was fine last week but now it won't even open. Even when I start it in safe mode it won't stay open for long and just goes back to the screen that says there's a problem and gives the option to re-start it or quit it but if I click on re-start, it doesn't work. I haven't added anything or changed anything, so can't understand why it's been working fine for years an now won't work at all. I don't know what plugins I have installed as I can't get in long enough to find out. Any suggestions or help will be much appreciated, as I really don't want to use any other search engine. Thanks.

Can anyone help please? I've tried everything suggested in the troubleshooting, have even uninstalled and re-installed it but it still isn't working. It was fine last week but now it won't even open. Even when I start it in safe mode it won't stay open for long and just goes back to the screen that says there's a problem and gives the option to re-start it or quit it but if I click on re-start, it doesn't work. I haven't added anything or changed anything, so can't understand why it's been working fine for years an now won't work at all. I don't know what plugins I have installed as I can't get in long enough to find out. Any suggestions or help will be much appreciated, as I really don't want to use any other search engine. Thanks.

Solução escolhida

Some problems occurs 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}


Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Network. Look for Configure How Firefox Connects and press the Settings button. Check the settings.

Ler esta resposta 👍 0

Todas as respostas (5)

more options
more options

Solução escolhida

Some problems occurs 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}


Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Network. Look for Configure How Firefox Connects and press the Settings button. Check the settings.

more options

Thank you so much for your reply FredMcD & finitarry. I had already gone through the things you mentioned without it helping any.

Strange thing is, I clicked on it again this morning, as I do every day, just to check that's it's still not working and guess what... it opened up and worked as if there had been nothing wrong in the first place!!

So still have no idea why it stopped working and wouldn't even open but now, for another reason I don't know, it's working again!! Curiouser and curiouser!! Thank you both for replying though, in a different scenario it could have helped. Appreciated.

more options

Might have been a bad file got removed, or an update. Well, Good luck.

more options

FredMcD said

Might have been a bad file got removed, or an update. Well, Good luck.

Yes it could have been. It's still working fine now (fingers crossed!!) ... so far so good.  :)