Firefox Community Forum

Hi Firefox Team,

I wanted to ask, whether you know any solution to my streaming problem. I noticed that my download speed is incredibly fast, when I am running a download in the background of my PC. This can be a windows-update or updating a game via steam. But when I am not downloading anything, then Youtube cant even stream 360p without buffering every 10 seconds. I feel like the Firefox-Browser is not telling my PC that it needs the internet and thus does not get it, but when another program needs internet, It gets enough to work.

My browser has been acting off lately, it takes a longer amount of time than usual to even open gmail. Sometimes, it just fails to connect to a server and keeps loading forever and just stops (including gmail).

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?

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.

We use Firefox to check our bank accounts. For that last 24 hours, we are stopped at a page that says Firefox cannot connect due to security problems. Does anybody know what's going on?

After a recent update to Firefox 133.0.3 (on Ubuntu GNU/Linux 22.04), Firefox is having difficulty connecting to websites and exhibiting some other odd behavior:

- After initially starting Firefox, it will load websites (e.g., previously open tabs) for up to 30 seconds. After that, it will not load any website in a new tab, showing the loading animation for several seconds before stopping all activity and just displaying an hourglass icon in the tab. These sites can be connected to in other web browsers. - After closing Firefox, its process is still running; I have to manually find its pid and kill it. - If I start Firefox from the terminal, I see these messages when it starts having trouble loading websites:

libva info: VA-API version 1.20.0 libva info: Trying to open /snap/firefox/5437/gnome-platform/usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_20 libva info: va_openDriver() returns 0

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.

So basically, I'm trying to add a 2FA code, homever when I scanned the code using google authenticator, everything went normal. Homever, when I try to put in the code, firefox only lets me put 5 digits but not 6. Any solutions?

I can use edge and my speed tests perfect on speed test. If I use Firefox the upstream is half. I only have block installed but doesn't matter if I disable or not.

Observed:

I use Firefox 133 on Mint 22, I have 2 browser profiles. When I access Atlassian Confluence (any confluence page under atlassian.net), the page content is loaded, but then disappears and I get the following error at the top of the page: "This page was in the background for too long and may not have fully loaded. Try to refresh the page"

This only happens in one browser profile: in the other, all the pages open correctly and quickly. When I open a private tab using the problematic browser profile, again all the pages open correctly.

I have tried clearing all atlassian.net and atlassian.com cookies and data from the browser privacy settings, disabling all extensions, restarting the browser, even restarting the computer, but to no effect.

Expected: Confluence pages should open using any browser profile.

Reproducibility: 20+ out of 20+ attempts

Workarounds:

Temporarily use the other browser profile or a private tab, although that way I don't have the benefit of using browser history and if I kill the browser while using private tabs, private tabs will not be restored, so I lose track of what I was working on. I could use a different browser for confluence, but that has the same history problem and is generally senseless: Confluence should work correctly using any browser.

Notes:

I have seen similar issues 3-4 times before with Confluence, but it was always due to extensions, so disabling the problematic extension or configuring it to ignore anything related to Atlassian was sufficient. I would report this to Atlassian, but they'll just say "it works with a blank browser, so it's not our bug" and they're probably right. There's some kind of Atlassian-related state being preserved in the problematic browser profile, but I can't pinpoint it, so any help there is welcome.

I’ve been troubleshooting a strange networking issue in Firefox that I haven’t been able to pin down, and it seems to be specific to Firefox’s network stack rather than my system or connection.

On several high-traffic sites that sit behind Cloudflare (Discord, Shopify storefronts, some SaaS dashboards), Firefox occasionally stalls during page load. The request shows up in the Network panel as pending for several seconds before finally completing. Sometimes the page partially renders and then hangs until the stalled requests finish.

A few things that make this confusing:

• The same sites load instantly in Chromium-based browsers on the same machine and network • The issue persists even in Firefox Troubleshoot Mode with extensions disabled • DNS over HTTPS on/off does not appear to change behavior • Packet captures show the TCP connection is established quickly, but some HTTP/2 streams appear to wait before data begins flowing • If I force HTTP/1.1 using a proxy for testing, the issue disappears

System details:

OS: Windows 11 Firefox: latest stable release Connection: fiber, low latency, no packet loss locally No system proxy configured

Things I’ve already tried:

• Clearing cache and site data • New Firefox profile • Disabling hardware acceleration • Testing with network.http.http2.enabled toggled • Comparing HAR logs with Chromium

One thing I noticed in the Firefox networking logs is that multiplexed streams sometimes wait behind earlier streams longer than expected, almost like there’s some internal prioritization or queue behavior happening. I’m wondering whether this could be related to HTTP/2 prioritization logic, connection coalescing, or how Firefox handles Cloudflare edge endpoints.

Has anyone seen similar behavior or knows whether there are any advanced networking prefs in about:config worth experimenting with (connection limits, HTTP/2 concurrency, etc.)?

Curious if this might be a known quirk with certain CDNs or just something unique to my environment.

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.

On Mac but not on Safari Firefox buffers for minutes before connecting. I’ve tried clearing the cache with no improvement. Until recently I never had this problem and as I said there’s no problem on Safari.

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 an account with the site, https://www.thecalendarcreator.com . It is a software that creates calendars for the present and future years. I have turned off Enhanced Tracking for the site (that worked for another site of theirs that I joined). Some functions work, many do not work correctly, if at all.

My computer is a Mac, v 10.13.6, so it's getting old. I have contacted thecalendarcreator.com support, and they can't find anything wrong on their end. They have suggested that perhaps it's some sort of anti-virus setting on my end. I've been looking at my Settings, but I'm no techie, so I don't know what to do. I would greatly appreciate your help, so I can hopefully get this site to work.

Thank you very much, Lea Lashaway