Firefox Community Forum

I can't log into chase.com from Firefox, which I've been doing for years. I get an outage message. But down detector shows nothing. It went on for days so I tried Microsoft Edge with Bing and it works. Is there some Firefox setting I need to change?

For quite some time now, I am unable to sign in to my account at CanadianTire.Ca I get an error. The signon process goes to CustomerAuth.Triangle.Ca for the email and password input. When I click "Sign In" the return message is a yellow triangle followed by the word "undefined" (see attached).

All other browsers I have (Brave, Chrome and Edge) can sign in without issue.

I noticed that other users have the exact same issue. I have tried all solutions I could find. The browser is up to date as of today (150.0.2 64 bit). I tried troubleshoot mode, clearing the cache, deleting cookies, history .... On the web site I turned off ETP for CanadianTire.Ca and CustomerAuth.Triangle.Com.

I have used Firefox since it was v0.93.

H E L P ! ! !

Hi all,

After the last update the former Mozilla Test Pilot "Snooze Tabs" isn't working for me any more, I tell a tab to snooze and it just stays where it is. https://addons.mozilla.org/en-GB/firefox/addon/snoozetabs/

I've tried running with addons disabled and then running with addons active again and the behaviour is the same. It's the same behaviour whether I run from the toolbar or the context menu.

I'm presuming this problem is related to Firefox update mechanics. Any suggestions for how to get this working again please?

Cheers :)

This has happened randomly on several different computers, both windows and ubuntu linux. It just now happened on my Win 11 computer. Was viewing the CNN news site and FF suddenly closed, without a "FF crashed..." message.When I clicked the icon to reopen it, it came up with the home page group of tabs instead of reopening the windows and tabs that were opened when it crashed. Worse, none of the previous months of history shows up and recently closed tabs and windows are both greyed out.

Is there a way of recovering the history of what I was working on at the time of the crash and what the hell is causing this? I am close to dumping FF and going with something else as this is highly annoying.

I have a new mac, an M4 mini, and I set up Firefox the way I want it (the biggest ask has always been getting a bookmark to open in a new tab). Two days in, sometimes a bookmark opens in a new tab, and sometimes it doesn't. I have nothing else set up except for an ad blocker. I have not changed my OS from Sequoia to Tahoe yet, I strategically delay. It's not the end of the world. But I had strange things happen with Firefox on my other mini (an M2) in the last 6 months and I had to abandon Firefox and use Safari, which I hate. But that's a whole other topic. I've used Firefox forever, and it's my fave, and little things like this bug me. What am I missing? I set the option to False, and then reset it to True, and sometimes it works as it's supposed to, and sometimes it doesn't. So to not overwrite an open tab that has something important, I just automatically click on the 'command' key when selecting the bookmark. It's staying on my selection to 'true' and I've set it to false and then set it back to true, and restart Firefox, and I still get inconsistent results. There's nothing else that could be conflicting with this. I don't get it. Like I say, Firefox on my other mini just totally became unreliable and I had to use Safari. Any ideas? Thanks!

Whenever i send a Tab from any Device to a Linux Desktop, the Linux Desktop is almost guaranteed to freeze. It doesn’t matter if that Linux Desktop is my "Dingus" PC with 2GB RAM and Wayland, or my "Workstation" PC with 16GB RAM and X11. On both Desktops, Firefox runs smoothly until it gets sent a Tab from another Device, then the whole Linux Desktop freezes. The Desktop doesn’t slow if i open the Tab on the Desktop in the “Tabs from other Devices” Sidebar instead.

Only my Linux Desktops freeze when they get sent a Tab from another Device. Android doesn’t slow when my Phone gets sent a Tab from another Device.

Bruce Caress

May 7, 2026, 15:17 CST

Hello, I've been watching MSNOW at 4pm eastern and after about half an hour it crashes. I get a message to send a report and restore the tab. I restore the tab which works for maybe ten minutes and crashes again. I am using Windows 11 on a new computer. I'd appreciate some assistance. Thanks. Bruce Caress

Moderator note: This question has been edited to precise Firefox and OS version, based on the crash reports.

Firefox 150.0.1 Ubuntu 22.04

Problem: When downloading a file from a web page, the list of files and folders in the Download Panel are sorted such that file names and folder names are intermingled, rather than the "standard" folders first, then files.

Discussion: This problem has been happening for a bit now (probably 2 - 3 months or more). Unfortunately, I don't recall exactly which version of Firefox this originally showed up in. At some point recently, the default sort for the Download Panel changed, so that instead of listing folders at the top of the list of download targets, then listing files, now all items are interspersed. For example, previously selecting to download a file from a web page would give the Download Panel contents as:

AFolder BFolder CFolder AFile.txt BFile.pdf CFile.jpg

Now, the list presents as:

AFile.txt AFolder BFile.pdf BFolder CFile.jpb CFolder

I would like to go back to the previous sorting behavior, but I cannot find a way to do this. I have searched the Mozilla help articles without turning up relevant information, and I have searched the internet for web sites that might list relevant information, but either the information I am seeking is not out there (unlikely) or I am not coming up with search terms that locate the information (much more likely).

I am not even 100% sure that this is a Firefox problem (it is within the bounds of possibility that it is an OS problem), but none of my other regularly used programs show the symptom, so it would seem odd to me for it to be something other than a Firefox problem.

I would appreciate any pointers (web pages, help articles, or even just "change this in about:config) on how to resolve this.

with the last and now the most recent Facebook versions i ahve beem having problems with Facebook, now it may be Facebook but i have it more on Firefox even with extentions shut off i get i what is it please help

I'm reposting a question already opened here because a moderator suggested to do so. Actually I though I was posting to the international forum from the URL...

I was trying to access a local HTTPS website of an embedded device (a Siemens S7-1500 PLC) that is using a self-signed certificate, but was unable to go on (attached image #1, in Italian language) due to the the SEC_ERROR_REUSED_ISSUER_AND_SERIAL error. I've browsed a similar PLC webserver in the past, so the fact that the device exposes a similar certificate serial number is not so strange for me, considering also it's self-signed.

The problem is that I cannot follow the instructions of the Mozilla knowledgebase here because I'm not able to identify the correct certificate of the website!

In the attached image #2 you can see that the connection is detected as not encrypted, I suppose because only the form part of the HTML that is posting the data using HTTPS while the rest is using HTTP, but I'm not sure. If I click on the padlock icon (attached image #3) the info about the current certificate is not displayed.

Then I went into Tools > Options and searched for "certificates"; as you can see in the attached images #4 and #5, neither in the Servers tab nor in the Authorities tab I can find any item that is related to 192.168.10.2 (the webserver IP address) or Siemens (the embedded device manufacturer). But unfortunately the error persist! Initially there was a 192.168.10.2:443 line in the Servers tab and I removed it and restarted Firefox, but it didn't solve, so at the moment the situation is the one depicted by the attachments.

I had to use Microsoft Edge to access the website, but I would like to solve this issue and use Firefox instead. Is there anything else I can do to bypass the error? Why doesn't the error page provide a way to correctly identify the wrong certificate using its fingerprint and/or name? Or, maybe, is there a way to disable this check for local IP addresses or for items in a whitelist?

Thanks for your help.

Today Firefox has suddenly started using ~20% of my CPU capacity, causing my cooling fan to run high most of the time. Since I had been running Firefox v.149.latest, I tried updating to v.150.0, but that made no difference.

It's not Firefox by itself (only Task Manager open) but whenever I open another tab with almost any website (including this one) that CPU usage spikes. What gives?!

Details: Running under Windows 10 Pro (yes, I have installed the ESU package, good until thi8s fall) on a Lenovo P1 Gen 2. Currently running Firefox inside a Sandboxie Pro v1.17.4 sandbox.

Please Help! -- jclarkw

Hello,

Since a recent update, I can no longer drag and drop files from the Firefox downloads panel directly into Outlook Web (webmail) as an email attachment. This used to work fine before.

Steps to reproduce: 1. Download a file (e.g. a PDF) 2. Open the downloads panel (the arrow icon in the toolbar) 3. Try to drag the file from the panel into the attachment area of a new email in Outlook Web 4. The file does not get attached — nothing happens

Expected behavior: the file should be attached to the email, as it was before.

Workaround: I have to open the downloads folder via the folder icon in the panel, then drag from Windows Explorer instead.

Firefox version: 150.0.2 (64-bit) OS: Windows Webmail: Outlook Web (outlook.office.com or outlook.com)

This is a regression, it worked in previous versions. Is there a fix planned?

Thank you.

When I click on option/link for "Print using the system dialog box", the print preview no longer works. Instead I see message "This app doesn't support print preview" in preview pane.

Hi,

I shared a lot of important tabs to my laptop (using the firefox built-in share/send to other device button), upon starting it, they seemed to arrive just fine and opened on my laptop, however I accidentally clicked to "history"->"restore last session", which made this firefox window go away and all my sent tabs seem lost.

Is there any way to get them back? Any type of log?

I tried the following already: - Looking through History (they do not appear there at all) - Looking at recently closed tabs (there aren't any listed) - checking synced tabs window (did not contain the ones I sent from my phone to my laptop) - checked session recovery files ( none of my synced tabs seem to have gotten stored into that session recovery file)

So is there any other log or place I can look at? I refuse to believe that this is not saved anywhere? Or on mozilla servers at least? Can support help me?

Thanks for any ideas!

EDIT: I found this, may is something similar: https://connect.mozilla.org/t5/ideas/send-tabs-log/idi-p/15640

I use Firefox frequently as it is the most useful browser I have. I want to keep a clean desktop and do not have icons on my desktop. Every time Firefox updates, it places an icon on my desktop. I do not want it there and delete it. It is very, very annoying to have to delete every time there is an update. How can I keep that from putting it on my desktop? If the thinking is that if it gets put there, I will use it, that will be what keeps me from using it. If I cannot find a way to stop it, I will remove the program altogether and figure out a way to do the things I currently do with Firefox. Please let me know how to accomplish keeping my desktop clean.

I thought I used to be able to access browser history from much longer ago, either way I can no longer see any history longer ago than 29/10/2025 is there anyway for me to restore, download or access older history, or has it been permanently deleted? I do still have a back-up of 28/12/2025 but I don't know if or where that contains history. I'm looking for data between 2019-06-01 and 2024-08-21. Weird thing is I remember accessing search history that old before... though I'm not sure how if if it doesn't store it for that long. Any help would be appreciated.

Since April 27th have been various situations where this msg occurs: Access Denied You don't have permission to access ht tp :// signin.ebay.com/logout/confirm?" on this server. Reference #18.17fc3117.1778464971.41591197 An error has occurred

Although the letters in the reference can be different.

1. Trying to open E-Bay with an icon presented in Firefox for E-Pay, or searching Google for 'E-Bay Login', in Firefox, Edge, and Chrome this msg occurs. 2. If I can sign on, when opening searchers from a folder the searches:

	A. Some searches have the words, and show items for sale, but the rest have the access denied msg where the search words should appear. 
Will send a pic when can sign on.

2. If E-Bay will open, sometimes all searches will load ALL with the search words visible in all tabs, but when click on a link for an item to sell, the access denied msg occurs. Sometimes a few searches will load with the name of the search in the tab, but other searches will load with the will load with the words access denied, and the mas when clicked. 3. Some website like Arkaim of some such issued this msg: Your IPv4 Address 104.187.9.142 received a bad risk score. 4. Left msg on Firefox about above, no response, left 2 msgs on E-Bay Technical Support, no response, Microsoft no help, Dell no help, AT & T sent new Gateway/Modem.

IP address changed, and IPv4 changed to  IPv6. Same problem.

At & T said the old router was slower than I paid for: Speed Test 210.6, 29.7 New router 475.5, 225.8. Google AI says clear cache: Clear Cache on Desktop (Chrome, Edge, Firefox) [1, 2, 3] 1. Open Menu: Press Ctrl + Shift + Delete (Windows) or Cmd + Shift + Delete (Mac). 2. Time Range: Select "All time" to clear everything. 3. Select Data: Check "Cookies and other site data" and "Cached images and files". 4. Clear: Click "Clear data" or "Clear Now". 5. Restart: Close and reopen the browser. [1, 2, 3, 4, 5] I saved the icon of Network & Internet, Internet Options to delete temporary files, history, cookies, saved passwords, and web info (same Thiong??????) Lastly Google AI recommended editing the DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1). Any danger in doing this?

I have always used Firefox. Today - some update has erased all my bookmarks. it says import from Edge - but I don't use that. I lost my job last month so all my bookmarks are so very important and now they are all gone. OMG

Please help.