Firefox Community Forum

I am a Cacti developer and we are considering switching from FontAwesome Web Fonts to Tabler Web Fonts. However, on Firefox for Windows only, we are having a major slowdown when using the Tabler SVG based webfonts. The page load is first stalled by Firefox apparently loading all the Web Fonts, which would appear normal with any browser (though exceedingly slow on Firefox for some reason).

However, once the page is loaded, when going off tab to another browser tab, and then back to the Firefox tab that includes the Tabler webfonts, there is a 3 second delay before the tab switches. When we enable the performance analyzer, we find that the delay is almost 100% Reflow of the page, even though the page is static as this point (no changes) from the last time it was activated.

We do not have this issue on Firefox for Linux, MS Edge or any other Chromium browser, only Firefox on Windows. I'm using the latest version 134. Should I be opening a bug?

As of February 13, 2025 the front page of the Washington Post website does not load correctly in Firefox 115.20.0esr in Mac OS 10.13.6. The problem persists even in safe mode. Thank you.

Home Internet speed via cable 500 Mbps. When checking the Internet speed through the Firefox browser (version 133.0.3), incoming and outgoing about 250 Mbps. That is, the browser cuts the speed twice. When checking the speed through Google Chrome (version 145.0.7632.160), the Internet speed is about the declared 500 Mbps. Please help solve the problem with Internet speed through the Firefox browser.

Suddenly this morning Firefox stopped connecting to any websites. It never gives an error message, it just tries to connect forever. Chrome and Edge can both access the internet without problems. I'm running Windows 11 Pro, and here's what I've tried so far:

Malwarebytes disabled Firewall disabled Turned off all add-ons/extensions Firefox uninstalled and reinstalled Firefox, Windows, Malwarebytes, etc all updated Cache & cookies cleared Refresh Proxy use disabled IPv6 enabled DNS prefetching set to "true" Full malware scan by Malwarebytes Computer restarted (several times)

Any other ideas? Thanks!

I am having difficulty trying to view a website. I receive the following message whenever I try to view this website:

"Suspected Phishing This website has been reported for potential phishing.

Phishing is when a site attempts to steal sensitive information by falsely presenting as a safe source."

There are two buttons beneath this message, the one on the left which reads "Learn More," the one on the right which reads "Ignore & Proceed." Yet when I click on either of the buttons a blank white page appears.

The web address in the URL field also changes from the website I originally selected to the following:

https://www.smartredirect.de/redir/clickGate.php?u=IgKHHLBT&m=1&p=8vZ5ugFkSx&t=vHbSdnLT&st=&s=&url=http%3A%2F%2Fwww.brutaltops.com%2F&r=https%3A%2F%2Fwww.google.com%2Fsearch%3Fq%3DBrutalTops.com%26sca_esv%3D9a8e8f6bd3ba345e%26source%3Dhp%26ei%3DHMO2Z6SJBaqWwbkP7JzXUA%26iflsig%3DACkRmUkAAAAAZ7bRLHc87-cSI48xaawgAj9EjL-Nm71U%26ved%3D0ahUKEwikh43Vx9GLAxUqSzABHWzOFQoQ4dUDCBM%26oq%3DBrutalTops.com%26gs_lp%3DEgdnd3Mtd2l6Ig5CcnV0YWxUb3BzLmNvbUjNa1CbCliBWXABeACQAQCYAW-gAfcKqgEEMTYuMbgBDMgBAPgBAZgCCaAClwaoAgrCAgoQABgDGOoCGI8BwgIKEC4YAxjqAhiPAcICERAuGIAEGJECGNEDGMcBGIoFwgILEAAYgAQYkQIYigXCAg4QLhiABBixAxjRAxjHAcICBRAuGIAEwgIREC4YgAQYsQMY0QMYgwEYxwHCAgsQLhiABBjRAxjHAcICCBAAGIAEGLEDwgIXEC4YgAQYkQIYsQMY0QMYgwEYxwEYigXCAgUQABiABMICCxAAGIAEGLEDGIMBwgIIEC4YgAQYsQPCAg4QLhiABBixAxiDARiKBcICCxAAGIAEGJIDGIoFwgILEC4YgAQYsQMY1ALCAhEQABiABBiRAhixAxiDARiKBcICFBAuGIAEGJECGLEDGIMBGNQCGIoFwgIREC4YgAQYkQIYxwEYigUYrwHCAg8QABiABBixAxgKGEYY-QHCAgoQABiABBixAxgKwgINEAAYgAQYsQMYgwEYCsICBxAuGIAEGArCAgcQABiABBgKwgIFEAAY7wWYAxPxBQrZJeqRYy6tkgcDNi4zoAeUYg%26sclient%3Dgws-wiz

Why would I not be able to view this website (and others too) with Firefox but am able with Chrome? I want to be able use Firefox, as Chrome will not allow use of an extension that Firefox will.

Please tell me how this problem may be fixed.

12/12/24 - netflix says i need to upgrade firefox browser in order to watch vis, but running MOST current version (115.18.0esr). Mac OS 10.12.6 . need help fixing issue. thanks

I'm using Mac OS 11.7.10. Firefox desktop no longer allows me to browse the internet. It just keeps spinning wheels. I've downloaded the newest version and it still crashes. What can I do?

I got a Firefox update recently and have not been able to access Flickr since then. I am getting a message that the page is not redirecting correctly. I am attaching the error message. I am running with standard firefox protection. I have cleared cache and cookies. I have also added Flickr as an exception to Firefox enhanced privacy tracking. Firefox is up to date (version 134.0.1 (64 bit)). Anyone else having this issue or know the solution?

Hello,

I am having major issues with Firefox speeds, Mainly upload speeds. On Edge I am getting 400 up & down (no issues at all). However, on Firefox upload speed is 144 Mbps, same on private windows. The only issue is with Firefox. Windows is up to date and Firefox version is 139.0.4 (64-bit)

Attached comparison screenshots for reference.

Below are the steps i performed:

=========================

Firefox Troubleshoot Mode Test: Download: 411.71 Mbps (Full Speed) Upload: 173.03 Mbps (Still Bottlenecked) Extensions Disabled Manually (Normal Firefox): No significant improvement. Hardware Acceleration Toggle (Normal Firefox): No significant improvement.

=========================

New Temporary Firefox Profile Test: Download: ~333 Mbps Upload: ~190 Mbps Problem persists even with a clean profile.

=========================

Temporarily Disable Windows Firewall Test: Resulted in ~349 Mbps Down / ~148 Mbps Up. Firewall re-enabled.

=========================

Could someone let me know how to get this fixed. Creating a new profile should have fixed issued assuming one of the extensions was causing the bottleneck. But even with a new profile its not making any difference.

Firefox is no longer compatible with my bank's system. I can't log in with the secure access code the bank sends to verify my identity when using Firefox. The bank says it is a problem with Firefox. Other browsers work flawlessly ... are you working on a solution? I only use Firefox unless forced to use something else ...

Working on setting up a new PC build. I've had to use some PC support website chats and many of them have just not acted right? For example, one would allow me to start a chat but then sent me directly to closing the chat like we were finished. The others would lock up my Firefox many times. Anything come to mind as to why this is happening? Windows 11 Pro v24H2 and latest Firefox version.

I'm on the local network. When I use Firefox to download a very small .docx file, the download gets stuck and doesn't move, taking a while to complete. But with Edge, it downloads almost instantly. Please help resolve this issue.

Hi,

I have donated to Mozilla Foundation in the past and will gladly do so again once a vexing issue has been resolved. I am using the latest Firefox version for Mac.

While using the updated Mozilla Firefox recently I find that allthewordsItypesticktogetherlikethis when I try to search for something. It can also happen when I type emails using Firefox. So I often have to change back to Safari.

Also, I notice that with the updated Firefox version, a mysterious blue square appears around the text I am working on.

Do you have any suggestions or instructions as to how to stop the annoyingjoingingtogether of words from happening? Please help!

Thankyou!

If I visit the website www.silviadesimone.it (I am the webmaster) through Google Chrome or Microsoft Edge, I can see the visit counter in the left bottom corner of the page. If I use Mozilla Firefox (that is the browser that I normally use) the visit counter does not appear. According to the ShinyStat helpdesk it could depend on some Firefox plugin that does not allow the counter to show. Can you help me? Thank you

When I try to sign into eBay, a multi-photo comes up asking me to identify like objects in order to be allowed to enter the program. I believe Firefox is causing this problem. How can I fix the problem?

I have tracked down the situation where my Internet download speeds drop from about 598 Mbps to around 267 Mbps after I open Mozilla. I am running a desktop computer with Windows 11 (updated) and Edge and Chrome. I am hardwired directly to my Xfinity modem (no WiFi connection). When I close Mozilla, my speed goes to 598 Mbps, and when I open Mozilla, my speed drops to 267 Mbps. This seems excessive and unacceptable. Are there any settings or anything to adjust, not to have Mozilla be such a drain on my system?

Hi,

The scouting association have updated their members website to membership.scouts.org.uk. This works, but from there is a link to my learning.scouts.co.uk. Sometimes this works but often I get "bad request, error 400". I've had to move to Edge when using this website. I didn't want to! I've used Firefox for years

Stephen Hogg

Once I visit any web site that uses HTTPS there is approximately a 90% chance it'll take seconds or even minutes to secure the connection. This never happens on other browsers as they load such pages instantaneously.

I already cleaned my data up and removed the extensions, both suspected and innocent bystanders, to no avail.

As stated in the title, I'm using Firefox 139.0.1 x64 on Windows 11 (24H2, build 26100.4061). This started happening after an automatic Firefox update, I never changed anything in my system configuration.