This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

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.

Learn More

After many fixes Firefox still running so slow???

more options

Hi Folks,

Since Friday 22/9/2017 Firefox has been running extremely slow to say the least. I have tried all the suggested tweaks in about:config. I have scanned the Laptop with Malwarebytes, Windows Defender, Panda Security and Spybot Search & Destroy but they all found nothing the system is clean. I've refreshed Firefox twice and installed a clean version with a fresh profile but the result is still the same. The next step I took was to do a clean install of Windows 10 and yet again that did nothing it's still running as slow as an old bus. After the clean install I have replaced a few add-ons that took 3hrs each to download and install 1.8 & 2.0mb. I'm clean out of ideas and hair can someone "pleeeeeeeeeeaaaaaaaaaaase" help with this issue.

"Thank you very much to anyone trying to resolve this issue it's very much appreciated cheers have a good one"!!!

Paperfree!!!

Hi Folks, Since Friday 22/9/2017 Firefox has been running extremely slow to say the least. I have tried all the suggested tweaks in about:config. I have scanned the Laptop with Malwarebytes, Windows Defender, Panda Security and Spybot Search & Destroy but they all found nothing the system is clean. I've refreshed Firefox twice and installed a clean version with a fresh profile but the result is still the same. The next step I took was to do a clean install of Windows 10 and yet again that did nothing it's still running as slow as an old bus. After the clean install I have replaced a few add-ons that took 3hrs each to download and install 1.8 & 2.0mb. I'm clean out of ideas and hair can someone "pleeeeeeeeeeaaaaaaaaaaase" help with this issue. "Thank you very much to anyone trying to resolve this issue it's very much appreciated cheers have a good one"!!! Paperfree!!!

All Replies (2)

more options

Hi

This may not necessarily be a Firefox issue.

I would recommend running the disk defragmentation tool in Windows, but also speaking to your internet service provider to better understand the very slow download speeds you are experiencing.

more options

Hi Seburo,

This problem is only happening in Firefox browser Microsoft Edge is downloading at normal fast speeds. After saying that I've just noticed it's running sweet again baffled to say the least. I'll just keep monitoring the situation, that's al I can do me thinks. Cheers and thanks for the reply I appreciate the help.