Firefox Support Forum

I have random Tab crashes in Firefox when running UI tests with TestComplete. TestComplete proviedes a dmp file. After analyzing with WinDbgPreview it provides an error with the xul.dll:

Attempt to read from address ffffffffffffffff

PROCESS_NAME: firefox.exe

READ_ADDRESS: ffffffffffffffff

ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%p verwies auf Arbeitsspeicher bei 0x%p. Der Vorgang %s konnte im Arbeitsspeicher nicht durchgef hrt werden.

EXCEPTION_CODE_STR: c0000005

EXCEPTION_PARAMETER1: 0000000000000000

EXCEPTION_PARAMETER2: ffffffffffffffff

IP_ON_STACK: +0 00000004`08bfd328 a807 test al,7

FRAME_ONE_INVALID: 1

STACK_TEXT: 00000004`08bfd190 00000004`08bfd328  : 00000004`08bfd328 00000000`80004005 00000000`0000000b 00000000`ffffffff : xul+0x12c298 00000004`08bfd198 00000004`08bfd328  : 00000000`80004005 00000000`0000000b 00000000`ffffffff 00000131`e0fece38 : 0x00000004`08bfd328 00000004`08bfd1a0 00000000`80004005  : 00000000`0000000b 00000000`ffffffff 00000131`e0fece38 00000004`08bfd328 : 0x00000004`08bfd328 00000004`08bfd1a8 00000000`0000000b  : 00000000`ffffffff 00000131`e0fece38 00000004`08bfd328 00000131`e0a22260 : 0x80004005 00000004`08bfd1b0 00000000`ffffffff  : 00000131`e0fece38 00000004`08bfd328 00000131`e0a22260 00000000`00000000 : 0xb 00000004`08bfd1b8 00000131`e0fece38  : 00000004`08bfd328 00000131`e0a22260 00000000`00000000 00001bab`405866c0 : 0xffffffff 00000004`08bfd1c0 00000004`08bfd328  : 00000131`e0a22260 00000000`00000000 00001bab`405866c0 ffffffff`ffffffff : 0x00000131`e0fece38 00000004`08bfd1c8 00000131`e0a22260  : 00000000`00000000 00001bab`405866c0 ffffffff`ffffffff 00000131`e0a22268 : 0x00000004`08bfd328 00000004`08bfd1d0 00000000`00000000  : 00001bab`405866c0 ffffffff`ffffffff 00000131`e0a22268 00000004`08bfd560 : 0x00000131`e0a22260

STACK_COMMAND: ~0s; .ecxr ; kb

SYMBOL_NAME: xul+12c298

MODULE_NAME: xul

IMAGE_NAME: xul.dll

FAILURE_BUCKET_ID: INVALID_POINTER_READ_c0000005_xul.dll!Unknown

OS_VERSION: 10.0.19041.1

BUILDLAB_STR: vb_release

OSPLATFORM_TYPE: x64

OSNAME: Windows 10

IMAGE_VERSION: 113.0.0.8524

FAILURE_ID_HASH: {52fb3732-4505-68ab-d740-b92ea07f3aaa}

Followup: MachineOwner

As I use Firefox throughout the day, webpages will just stop for a bit. Sometimes its only a few seconds, other times for a few minutes. It is most noticeable when playing videos but does happen at other times as well. During the halt, I can still access Firefox's settings and all menu items. It is just website interactions that stop.

For example, when a halt occurs on youtube, the video will eventually stop, depending on the buffer, and scrolling through the comments won't pull up any more and replies won't load. Then after a few moments, everything will start working again without issue, and all the uncompleted actions (such as opening new replies or trying to go to another page) will execute.

I used to think it was related to my computer's connection to our company's access server, but refreshing my connection through a CMD ipconfig /renewall worked so rarely that I assume it was just coincidental timing.

I also tried turning off hardware acceleration, but that had no positive effect. I'll make a separate post about that issue.

The thing that fixes it every time is odd: launching Chrome. I wanted to make sure it was just Firefox, so I tried launching Chrome, and then Firefox started working immediately. (Spotify still plays when Firefox halts too)

Is there anything I can adjust to keep this halting from happening? I can manage right now, but it is sort of annoying to launch Chrome every time.

Firefox 117.0.1 Windows 10.0.19045 Build 19045 Unable to download statements on Barclaycard site. Just spent ages with Barclaycard chat who continued to say Firefox does not support pdf even though I said I was downloading on many other sites no problems. On Barclaycard site I did a transaction search and downloaded the result as a pdf OK. pdf downloads open directly in Adobe reader. Trying to download a statement does nothing, no error, just nothing. Microsoft Edge works ok. Been using Firefox for years on this site no problem. A latest Firefox update problem?

Dear Sir/Madam:

I am using Firefox Browser 102.15.1esr (64-bit) on a MacBook Pro Ventura 13.5.2.

I have been using the www.dictionary.com website for a long time, but recently when I attempt to go there, I keep getting the error message as follows:

Unexpected Application Error! FM.findLast is not a function

WM@https://www.dictionary.com/client.e12a2de6.js:36:305976 $o@https://www.dictionary.com/client.e12a2de6.js:1:26519 ka@https://www.dictionary.com/vendor.60d89d9a.js:1:864941 xu@https://www.dictionary.com/vendor.60d89d9a.js:1:921923 bc@https://www.dictionary.com/vendor.60d89d9a.js:1:910907 yc@https://www.dictionary.com/vendor.60d89d9a.js:1:910835 vc@https://www.dictionary.com/vendor.60d89d9a.js:1:910696 ic@https://www.dictionary.com/vendor.60d89d9a.js:1:907503 oc@https://www.dictionary.com/vendor.60d89d9a.js:1:906055 E@https://www.dictionary.com/vendor.60d89d9a.js:1:996565 P@https://www.dictionary.com/vendor.60d89d9a.js:1:997096

I tried clearing caches under Privacy & Security, but the problem persists.

(Meanwhile, I can visit www.dictionary.com on Safari and Google Chrome.)

Could you please let me know what is going on?

Thank you,

Roland

Hello everyone,

to archieve some good old games, I use an special version of Firefox. Firefox (MyPal): 29.2.0, with Adobe Flash preinstalled, Disk-Cache

For most games it will suffice: After loading all content online, it will be available offline too. But... some audio/video files will be saved in memory cache - %temp%\mozilla-temp-files\*[random-auffix] - instead of in disk cache. After closing session they get deleted and after restart they are saved again, with another suffix.

Sample file: http://arcaneonlinegame.epizy.com/Arcane/frames_files/midi/Ophelia's Journal.mp3 that is shipped with http://arcaneonlinegame.epizy.com/Arcane/Arcane.htm

How can I tell Firefox to permanent save streamed audio/video files, like Firefox does with everything else? In the end the music should play if I open the browser offline too.

Thank you in advance for your help. Drago

I use two monitors, and I have multiple firefox windows open at once. When I turn on my pc and open firefox, the windows almost randomly position themselves on both monitors, sometimes they are not maximised either. How can I change this behavior so that all my firefox windows open, maximised, on one monitor rather than both?

My Firefox tab crashes often. I eventually need to reboot Firefox. My Windows 11 patches is always up to date and I did system checkups often. I cleared cache files too.

Your Firefox profile cannot be loaded. It may be missing or inaccessible

on debian 12 linux

I tried `firefox` `firefox-esr` `thunderbird``firefox -P`. I also deleted `~/.mozilla`, `firefox -p presaved-profile-dir` stay the same.

the `firefox binary` and the `profile dir` are all useful because I saved them to zip file and use them every day. So is there any other dir besides the 2 dir which fails the startup? even thunderbird fail with the same reason.

Help please, thanks!

Hi I am running latest firefox on windows 10. After a google search I have to put the view to full screen or move the window to see all the options on the right like 'tools' which I use a lot to limit to UK and the last year. is there any way to notice the window isn;t full size and the optios display should be made smaller or put into 2 lines?

At some point, I've noticed that certain behaviours expected to occur when pressing the Escape key no longer did. Those behaviours mainly involved triggering some Javascript, including functionality in keyboard-related extensions, such as Tridactyl. Browser-level functionality on the other hand, such as pressing Shift-Escape to open `about:processes`, or pressing Escape to close Search Suggestions when the URL input bar, continue to work as before.

Upon investigation, I found it is specifically the javascript Keydown event that isn't being registered, while the subsequent Keyup event still is. I used https://w3c.github.io/uievents/tools/key-event-viewer.html to test this.

I also found that starting Firefox in Troubleshoot Mode (Safe mode) doesn't resolve the issue. On the other hand, creating a new profile does.

I've looked at the modified settings in `about:config`; there's a lot, but nothing stands out as being related to keyboard input or javascript.

Can someone please help me find what is causing this?

I have a number of pinned tabs, which occupy a lot of space.

I'm looking for something like a drop down menu to the left of the tab bar for only pinned tabs, which would then eliminate there display on the tab bar. Kinda like a pinned tab bookmark button.

I'd prefer it on the tab bar, but I guess a toolbar button would do.

I'm trying to restore Firefox Bookmarks and stored login/passwords from a Time Machine backup of my Macbook Pro. I've read in the Mozilla support articles where this info is stored, but my backups have no Firefox folder under "Applications Support." Did it get eliminated when I signed up with Mozilla in order to get help with this? These files are on my current system, but they only have a few items that I've entered today.

Since 117(Beta)I have an issue with Firefox refusing to apply the update it downloaded. I've tried searching left and right on the internet for a solution and one does work which is installing the newer version of the browser each time myself. But this is ofcourse not a solution in the long run.

It tries now to apply the update 118b9 to stable version 118 and it did downloaded just fine and asked me if I wanted to close the program to let it update which always worked. I've tried different DNS to see if that could be the problem, tried a clean default profile to see if that helped, I haven't tried uninstalling it and reinstalling it, due to me losing my passwords and what not.

I also tried to run the stable version to see if the issue was still there and it is still there, so me using the beta channel isn't the issue here.

Firefox 117.0.1 (64 bit) Build 20230912013654 Windows 10 Home - Version 22H2 OS build 19045.3448 The link to download my Sears credit card statement in pdf form has disappeared when accessing the website (https://citiretailservices.citibankonline.com) with Firefox. It still appears and works normally when the website is accessed with Chrome. I have the uBlock Origin extension installed on Firefox, but it is disabled on the Sears website. Screencaps attached.

I have noticed few problems using history with Back and Forward Button.

Firstly whenver we use back button my website to the hiistorical visited website in that same tab. However i have noticed that it keeps forgetting the count or number of historical sites visited in the same tab.

For Eg: if i navigate to several pages on the same site. Firefox will only remember few clicks upto 2-3 back.

Surprisingly when i click back button i am not able to come back to the last visited page by clicking forward button. Once i click back button then i wont be able to come to forward sites as the forward pages are fully lost.

I dont know why is this happening

I started getting screen flashes and then identifying pop up windows that go to adform dot com addresses, that are blocked on my computer so nothing other than a error shows up. Its annoying and random. I have checked security page and it says Block pop-up windows and this is blocked. Two exemptions are there which are acceptable. I have run virus checks on Bitdefender and Malwarebytes (Latest versions update) nothing is reported. - What is causing this and how do I stop it? After opening up the hidden window that flashes it tries different pages all fail then eventually the pop up window closes on its own.

Using latest version of Firefox browser 117.0.1 (64 bit) Don't get the pop ups on Google Chrome.

1. Drop down to select the question. In search engines, when entering text, there is usually a text prompt to choose from, but I cannot select it 2. Verification code issue. The verification code usually swipes to the right after input, but cannot be moved at all! 3. Video acceleration issues. On video websites, it used to be possible to right-click to indicate video fast forward, but now there is no response after operation

My English is not good. Could you please write something simple and easy to operate so that I can translate correctly? Thank you