Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

Learn More

Firefox runs very slowly after Windows 10 update

  • 5 个回答
  • 1 人有此问题
  • 2 次查看
  • 最后回复者为 FredMcD

more options

On Saturday 12 December, Windows 10 spent an age updating itself, with several reboots. Since then, browsing has been intolerably slow with Firefox, although my internet connection is still fine (working fast from my smartphone and using Microsoft Edge). I have two PCs and both seem to have been affected in the same way. Using Task Manager, I see that Firefox is using lots of CPU nearly all the time - often over 50%. Even typing and scrolling is very slow, not just downloading. I have turned off all my add-ins and plug-ins, run in safe mode, restarted and reinstalled Firefox to no effect. Until now, I would have said Firefox was the fastest browser. I think Firefox updated itself to version 42.0 several days ago, so I a suspicious that this slowdown has happened just after a Windows update.

On Saturday 12 December, Windows 10 spent an age updating itself, with several reboots. Since then, browsing has been intolerably slow with Firefox, although my internet connection is still fine (working fast from my smartphone and using Microsoft Edge). I have two PCs and both seem to have been affected in the same way. Using Task Manager, I see that Firefox is using lots of CPU nearly all the time - often over 50%. Even typing and scrolling is very slow, not just downloading. I have turned off all my add-ins and plug-ins, run in safe mode, restarted and reinstalled Firefox to no effect. Until now, I would have said Firefox was the fastest browser. I think Firefox updated itself to version 42.0 several days ago, so I a suspicious that this slowdown has happened just after a Windows update.

被采纳的解决方案

Update: Windows updated itself again today and, as if by magic, Firefox is well again. So problem solved.

定位到答案原位置 👍 0

所有回复 (5)

more options

Start your Computer in safe mode with networking. Then start Firefox. Try Safe web sites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia


As a test, disable your protection programs.

more options

У меня вопрос вы сравнивали с другими браузерами потому что Firefox не должен забирать много ресурсов у меня после chrom я просто счастлив посмотрите другие браузеры чтобы понять тормозит браузер или сама система.Да не плохо прогнать систему антивирусом и почистить системный реестр но опять же главное посмотрите как грузятся страницы на других браузерах скорость загрузки я имею в виду

more options

In safe mode with networking, Firefox runs normally and is responsive on all the websites I tried. Now what do I do to make this happen without being in safe mode?

more options

选择的解决方案

Update: Windows updated itself again today and, as if by magic, Firefox is well again. So problem solved.

more options

Why is it everytime they fix something, it breaks something.

Safe Surfing.