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Firefox isn't having a memory leak (RAM and CPU usage stays the same) nor is it maxing my GPU or anything like that. But if I watch enough of a 1080p60fps stream or enough 1080p60fps content in general (this stream is a notable offender: https://www.youtube.com/watch?v=W6OOnrx8g58), it'll start to slow down over time (generally a couple of hours) and [really chug and drop frames like its nobody's business: https://i.imgur.com/OmHqJ8a.png. This does not occur in Edge (the streams run silky smooth even after 2+ straight hours of watching), nor does it happen on other streaming sites like Twitch. It also doesn't happen in Firefox on my desktop.

Regular 1080p60fps videos are MOSTLY unaffected. The buffer wheel animation in most videos is choppy and moving back/forth with the 5-sec rewind/ff feature results in a short, choppy buffer wheel on a lot of videos(https://imgur.com/tm1AtkB), even if the video itself is mostly unaffected. Some more "intense" videos will make the fan speed go up. HD videos are *slightly* less smooth when in this state. Unpausing a video often results in a short buffer wheel before the video resumes if left paused for at least a minute or so. I also get a tiny TINY bit of frameskip on the occasional Twitter video while in this "state".

Its like the memory is "caching" something and killing the process clears that "cache", yet I have no idea what is actually doing this.

Refreshing the page/closing and reopening the stream stream has no effect, its like an affliction and will still be choppy when you reload. Restarting the Firefox session or killing the process the stream or a video is running through fixes it for awhile (even if the stream stilll drops more frames overall than it would in Edge), but it feels like I have an "allowance" of 1080p60fps content before these streams start to chug. Nothing else in-browser is lagging at all.

bold textExperienced Firefox browser session freezes a month or two ago. It seemed that some March/April '24 fixes/patches stabilized the app. They are occurring again with increased frequency. What should I do to avoid this problem or switching to another browser? Thx

hello when i write many cell code in google colab and then run all of them when output there and i want to scroll up from last cell code to go to top of page,i have lagging for scroll up in that and this problem just in firefox and in chrome is'nt problem thanks

Well, since I changed to a new computer with Win 11, videos on Facebook don't play right. They are videos that are posted by various people and real entities. They are not smooth. They start to play and immediately pause then jump forward then pause and jump forward. If I copy the link and go to Chrome, paste the link and play the videos, they are normal Never did that on my old computer. Any ideas why the videos don't play normal?

Very similar to -> https://support.mozilla.org/en-US/questions/1427103

My firefox now freezes when I click in the URL bar. NO solution I have found so far other than task manager -> end task and restart the browser. Occasionally that will work, other times it will immediately freeze again.

Historically I have had a LOT of tabs open, more recently less than 20 tabs. I have never seen the issue before.

Windows 10 22H2 Ryzen 3600 32GB RAM Nvidia RTX 3060 LHR 3 Monitors 2 - 1920x1200, 1 - 1920x1080

What I have tried so far: - reboot - restart firefox - "refresh" firefox - troubleshooting mode - removed all extensions - removed some extensions - reduced tabs down to a few - tried to click in the start page search instead of url bar - turned off hardware acceleration - turned on hardware acceleration - turned off TLS DNS - using only 1 window at a time instead of 2 or 3 - waited for an hour or so and window did not become responsive

None of these solutions fixed the issue. A screenshot would be useless as the window looks fine, but the UI is unresponsive.

I've been noticing apparent duplicate messages within my unified folders inbox on my desktop recently.

Looking further I notice that one of my accounts has 'INBOX' as one of its subfolders which is where the problem appears to stem from. When I look at that account in isolation (ie not in unified folders) I can still see the inbox as a subfolder.

The subfolder 'INBOX' appears to be a duplicate of the account's main inbox (it contains the same number of emails), which may account for the appearance of duplicates.

At a guess this is probably related to inadvertent moving of folders. I find that when trying to use the scroll bar (to scroll down the subfolder list), if the mouse strays slightly to the left it will pick up a subfolder and move it unintentionally. This can cause all sorts of problems with disappearing emails and the folder structures showing differently on different computers.

In this case the duplicate email problem only happens on my desktop. On my laptop I can still see a subfolder named 'INBOX' but it shows as empty and I don't see the duplicate emails in unified folders.

It would be really useful if Mozilla could introduce a 'confirm folder move' feature as that would eradicate inadvertent moves.

How do I resolve the apparent duplicate emails on my desktop? I am somewhat reticent to delete the subfolder 'INBOX' for fear of the potential consequences. . .

Hi,

I have a user who sends me an email to one of my email addresses and it always ends up in the Junk folder. I've repeatedly marked his emails as not junk but that doesn't seem to change anything.

Is there anything I can look at that will help me figure out why it happens, and hopefully find a way to fix it.

I'm on Betterbird in case that matters. I looked thru the release notes and there seems to be nothing tagged with the junk filter.

I noticed this in the X-Proofpoint-Spam-Details email headers: mlxlogscore=764 clxscore=1015

This person seems to be the only person that has this information in their headers. Is it added by the junk filter? Or is it something on the sender's side (he uses an icloud.com and a me.com address)?

Thanks,

L

Windows 10. Weird glitch.

If I use Wondershare UniConverter's downloader function to download a video, as soon as the download starts, all Firefox open windows close. This is a recent thing, the last couple of weeks or so. I have reinstalled Firefox and UniConverter. The first time I tried it after reinstalling UniConverter, all was well. But the same issue has shown up again. I have tried rebooting my PC to no effect.

Any bright ideas welcome!

There seems to be something specific to the Phlearn site and Firefox which prevents videos from auto advancing. They either recommence the just completed video or revert to an earlier one.

Hi,

I recently facing an issue that the Firefox browser randomly maxed out my RAM and went unresponsive. Like the screenshot below, I am only trying to open Facebook and Instagram, 2 tabs.

I have tried to open about:memory and about:processes to monitor but it just went unresponsive and both the monitoring just hanged.

Have no idea why the Firefox process taking up so much RAM. Need help.

As of Supernova update it would seem, thunderbird is unable to fetch favicons for newly added feeds. They will always display a globe favicon, instead of the respectful favicons.

Worse still, it would seem like removing a feed from the folder doesnt revert it to the folder favicon, but rather keeps the globe!

is there a way to force thunderbird to fetch relevant favicons, or add ones manually?

This isn't the first time this has happened. After each occurrence, I have to completely uninstall the browser and reinstall it from scratch. This means I have to reopen all my tabs, which is very annoying. In Chrome, I have had a large number of tabs open for many years and it works fine.

With Mozilla, something terrible is happening... I have many tabs open in Mozilla, and there comes a moment when, upon launching the browser and opening two or three tabs, Mozilla starts consuming up to 10 gigabytes of RAM. If I open a few more tabs, the browser crashes. I don't need to open 50 or 100 tabs, just 7-8-10 tabs are enough to make the browser crash. Moreover, if I open a new tab and go to google.com, the browser takes a very long time to load, even if it's the second tab.

This problem has happened before. I don't do anything with the browser, just visit sites like YouTube.

Clearing the cache and other recommended actions do not yield positive results. This is very annoying. Mozilla is my first and favorite browser, which I have been using for almost 20 years. I wouldn't want to uninstall Mozilla.

Thunderbird takes a long time to open?? First it displays a blank page Then blank page marked: loaded Then it opens on the email account I saved the Profiles folder I carefully uninstalled, cleaned and rebooted, then reinstalled the latest version and replaced the Local folder in the new Thunderbird to find all my local folders Version 115.10.2 (64 bits) Win 10 Home 22H2

Hi,

I have a problem every time I close thunderbird, a few seconds later at least another two programs start up on their own. Its usually the Whatsapp desktop app or google games. Some times something from Nvidia will pop up.

Hi. I have this strage problem X writes a mail to "support". "Support" is a distribution list. I receive that mail

I then reply to X. Sender is "support" as it is defined as an Identity under the main mailbox Also there is a rule in that identity to sens a cc copy to support itself (so collegues belonging to list "support" receive a copy)

I then need to send a second email to X, starting from the sent message (as it is a follow up)

So i go under "sent mail", i find the message i sent previously, having from "support" to: X cc "support"

(1) I click reply and i get a message with: - from "support" - to "support" - cc "support"

So "X" has disappeared

(2) Note I have no button "reply to all", but if i right click the masse and the "reply to all", i got a good message with: - from "support" - to "X" - cc "support"

Hope this is clear. Someone can help ? My need is click reply and get result as described at (2) Thank you

Thunderbird 115.10.1

If I attempt to print many emails at one time (by selecting a group of them from a mailbox), Thunderbird sometimes gets lost in the middle of the job and chooses a random email (not from the selected group or even the same mailbox) and combines many others into the same email and tries to print (leading to a single email showing 200+ pages for that one entry in the print queue and actually composed of many emails put together, but not the ones I selected).

Does not happen if I only select a few emails at a time.

Sounds like an indexing issue with the file that holds all the emails. Perhaps something gets corrupted?

Any suggestions?

When accessing my site (in attachment to avoid indexing), Firefox blocks with a "Possible security risk" interstitial. DoH requests to the configured https://dns.google/dns-query service work from an external application on the same machine as the browser, but about:networking#dnslookuptool reports the host being unknown.

I attempt to open Thunderbird in an iMac but the computer says it is already open and only one can be open at a time. I can not find a Thunderbird open on the computer.