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I know, sounds stupid, but it is what it is. It happens rarely, only with Firefox on the secondary display from my laptop, via HDMI. It starts with some random few thin horizontal bars across the window itself, and soon, it turns off my display. It seems the bigger the window is, the more severe the issues. So full screen usually, it shuts it off and keeps it off. Not black screen, no signal style. I manage to get it out by Winkey+arrow. If i then put it back same issue. If i lower the width of it, it manages to stay coherent longer, but still resets the display with a quick black screen on page reload. The lower bounds on a 1920x1080 display resolution was 1515 pixels. At 1515 pixels, it works fine, once this is triggered, it's very repeatable on 60-70% of webpages. If i drag another window on top of Firefox, the monitor comes back up.

Before anyone asks: I have tried turning off hardware acceleration. I have tried putting firefox.exe to run on the integrated video card and on the dedicated 1060 Max Q videocard. I have cleared cache and etc.

This persists on a Windows session, across multiple Firefox restarts. A computer restart technically fixes it but i have no clue what triggers it. Laptop monitor works fine.

We’re having a weird issue with Thunderbird that’s showing up on multiple computers using the same mailbox. When we search using the top search bar (Ctrl+K), it often doesn't find all emails that clearly match the search term For example, we have multiple sent emails with the searched phrase in the subject, but Ctrl+K only finds one of them, even though there are two (or more) that match. When we use Ctrl+Shift+F (advanced search) with the exact same keyword and folder, all the matching emails show up just fine.

So it's not like the emails are missing —they're just not being picked up by the Ctrl+K search.

The annoying part is that Ctrl+K lets us open the whole conversation thread, which is really useful, while Ctrl+Shift+F only shows single messages.

Ive tried to:

- repair folders

- delete .msf files

- rebuild global database

- reenable "Include messages in this folder in Global Search results" but it did not help

And this isn’t just one machine, it's happening on every PC where this mailbox is used

Full Blank screen when opening new tab or webpage Does this intermittently, at least once per day. Recovery is to clear all active apps from memory, then reopen Firefox; previouse tabs are present.

No relation to number of tabs open or number of other apps open.
This problem has persisted for at least 2 FF build updates.
 It is NOT A MEMORY ISSUE, I checked last failure

3.8gb in use out of 8gb!

Using Android 13. Firefox: 139.0.4 (Build #2016095887), hg-3825afc77e5b+ GV: 139.0.4-20250609112858 AS: 139

Onboarding with RSS subscriptions for a couple weeks and can't make any sense out of the folder hierarchy structure.

• UI's folder structure & the Subscription settings folder structure screenshots included.
• Folder A seems logically coherent: a "folder full of feeds". Single folder in UI. Multiple feeds (3) show up in the queue
• Folder B structure starts to become much more incoherent

   - Feed's are actually folders now. Sometimes.
       + Feed1 & Feed3 = folders. But UI 'folder' displays just the one feed, as if it was a feed.
       + Feed2 = folder, with the 'actual' feed within it. But then it displays in the exact same way as Feeds 1 and 3
   - seem to have contradictions running in both directions.
       + If they are feeds, is confusing they display with folder icon
       + Not clear why a feed-as-a-folder would display exactly the same as a feed-within-a-folder

• "feed7" situation I can't understand to be anything other than a bug.

   - Subscribed to the feed within folder C. It instead shows up in the UI in Folder B. 
       + Which bafflingly *only* includes feed7, and does not roll up or aggregate any of the feed/folders (whatever they are) within it.

Like the integration of having RSS within Thunderbird, but need some clarification. Docs (https://support.mozilla.org/en-US/kb/how-subscribe-news-feeds-and-blogs#w_folders-and-accounts) were not of use.

Thanks.

Again ONLY in FF harbor freight search function breaks when entering a search.

Yes, please don't give me the MS ctrl-alt-del type of response about cookies.... That was done many times before posting this. The website works fine in Brave. MS Edge well, let's not speak of it in public company shall we.

So, now what the heck is happening to FF???? I have contacted HF three times and they referred me to use other browsers other than FF. No, I DO NOT have multiple extensions nor themes. FF is bare bones but for uBlock. Hardware acceleration is off and MS Clear type is on. Anybody wanna fess up, who broke this????

Free youtube downloader wants my age from Firefox to download popular music videos. I am logged in to FireFox and Free YouTube downloader identifies FireFox as my default browser.

This is really an error for Free YouTube Downloader to correct, but many FireFox users must have solved this already. Any advice?

Thank you!

Mozilla's documentation on IMAP Synchronization Mozilla's documentation on IMAP Synchronization indicates

"Non-synchronized messages are still accessible within Thunderbird. The only difference is that rather than downloading the entire message, only the message "headers" are downloaded. (Message headers contain information like the sender, recipient(s), subject, etc - everything except the body of the message.) The message body is not downloaded until you click on the message in the message list"

Under what settings (e.g. Sync messages checked or unchecked) does this behavior apply?

Thanks.

Hi:

I can't send in my one email account, the other 2 are working fine.

The error message says " Sending of the message failed. An error occurred while sending mail. The mail server responded: Email rejected. Please verify that your email address is correct in your account settings and try again."

Can you help, please?

Thanks,

John Samms

When using the UBLOCK ORIGIN extension i cant Join the app. i need to turn it off, then I can join the Firefox nightly. I need help because I use this extension so much.

I understand that Firefox relies on both intermediate and root CA certificates for verifying add-on signatures. There was a recent incident where a root certificate expired on March 14, 2025, as noted in the following article: https://support.mozilla.org/en-US/kb/root-certificate-expiration

Could you please let me know the latest validity period (expiration date) of the root and intermediate certificates currently used for add-on signature verification in the latest version of Firefox (139.0.4)? I understand the certificates involved may vary depending on the add-on, but I would like to confirm this specifically for the following add-on:

X-Forwarded-For Header https://addons.mozilla.org/en-US/firefox/addon/x-forwarded-for-injector/

Thank you in advance for your assistance.

Sending this using Safari because Firefox is totally messed up. Firefox 115.24.0esr (64-bit) OSX 10.13.6 High Sierra 2011 Mac Power Book (MPB) with 16 GB RAM. Verizon DSL line, download speed tests from 10-14 Gb/sec but Latency is always 400-900+ msec. No way to measure Jitter with speedtests that will run on my older system, or Bufferbloat now that DSLreports has gone dark.

I want a tool that will allow me to see all the attempts to connect, and packets/traffic, to see it its my old computer going bad, Firefox, the wireless or wired connection to the DSL modem/router, or the DLS modem/router itself, such as a problem with reaching the Domain Name Server (DNS) etc.

I can access the DSL modem/router in the browser, but there isn't much documentation. Its made by Actiontec but customized firmware for Verizon.

The problem persists whether I am using wifi or an Ethernet cable.

My wifes 2010 MBP computer with 8GB RAM using about 6.4GB, running High Sierra and Firefox 115.24.0 (esr) seems not to have the problem at all.

Firefox will show something in the lower left corner, "connecting to..." or "loading..." etc. It can stall with either status.

Search engines would be StartPage or DuckDuckgo. With DDgo, sometimes it just spins forever, but if I click on the URL bar, it drops down another line with the same URL and "--Visit" appended. Sometimes that will load, but seems random.

Some URLs / links open in a few seconds, some spin forever.

I first called Verizon Tech support on May22 about problems (see full exchange of repeated calls & new trouble tickets below). I think, IIRC, this happens to be shortly after I upgraded my Firefox version. They have admitted to PINGs not returning, packet loss, no excuse for the Latency.

I do have a lot of pages/tabs open; Activity Monitor says my memory use is about 14GB, but the Memory Pressure stays low in the green. I also run Thunderbird, TextEdit, maybe Adobe Reader and Excel. But even when I close everything else, the non-loading issue persists. When I shut down Firefox, the memory pressure can go into the red and take a very long time (so I always shut down all other apps first). A recent shutdown stalled & I ended up losing many open pages/tabs, but even the slimmed down load has the same problem.

I have shut off the AddOn NoScript, but the problem persists.

FILE: verizon DSL tech support WED 21MAY25 glacially slow web page connection

800-837-4966 AGENT DSL tech support

failing the PING reset my IP address still fails PING

trouble ticket MDHM03KR7A

2-3 working days for networking team to resolve

THUR 22MAY25 call back from networking guy. they raised the speed to 13.4 but latency still 28, he says should be 15 max. Asked him to optimize by reducing download speed. will call back later or tomorrow.

I'm using Google Docs in Firefox. Every time I right click and then click paste I get a message explaining that Firefox is incompetent and I need to hook my keyboard up to my tablet and use Ctrl + V. And tap/clicking Edit > paste won't work either. I use a mouse with my tablet, but not a keyboard.

How to I get FireFox to allow me to use Right Click or at the very least Edit > paste? Even Opera Browser can paste in a Google Doc.