Firefox Community Forum

I use Firefox for viewing my Rogers/Yahoo web mail in an open tab. I have granted Yahoo mail permission to send notifications and I get a Windows 11 toast notifications when there is a new email in my inbox.

The problem that I cannot figure out is that the notifications take the form of "X undefined", where X is the sender's name. There is something that is appending the word undefined to the sender's name in the notification. I also note that these notifications are "sticky", that is, they remain visible until dismissed. I would prefer that they dismiss after a few seconds and remain in the notification centre.

I am using Windows 11 Home edition with the latest updates.

WELL BEFORE BROWSING AND SAY LOOKING AT IMAGES OF SAY THE BEATLES. I WANT TO SEE ONE PHOTO SO I LEFT CLICK. ALL IT DOES IS GO BACK TO ORIGINAL SCREEN. WHEREAS FOR YEARS THE PHOTO WOULD POP UP. THAT'S MY ISSUE?

At some point I decided to use default tab wallpapers by Mozilla. With an update of home menu 151.0 , there is a new logo in the center "Firefox". You can see it on (screenshot 1). It covers any background picture, in my case a tail of the fox. I can't figure out how to hide this logo. I have one icon on my taskbar already; having it in the layout is just a redundancy. Obviously i know that i use Firefox there is no need to remind me that

A little extra note: The layout reflow of the logo works bad when the window is resized. It's not centralized.(screenshot 2).

The only band-aid that i see is in Settings >> New tabs >> Blank Page. It turns of wallpapers and whole layout of homepage which is not my target (screenshot 3).

I use Ubuntu 24.04.4 LTS , snap Firefox 151.0.1

I mistakenly agreed to update Firefox to V 151.02. Once again I regret it but there is no way to turn off the stupid prompt windows telling to you to update.

Now when i open a new tab , the wasted space on my COMPUTER screen is incredible. Instead of the old format withm3 wide "columns" of suggested stories/articles it is now one prominent, and a narrow list of only two wide. requiring me to scroll down twice as far as I used to. I have large white blank unused screen space being wasted. It seems to be optimized for only people who use their narrow phone screens only in portrait mode.

I hate the random useless changes that affect my normal everyday usage of the browser, without any options to go back to old formats or settings.

I am actually thinking of switching to EDGE, or Chrome on my Windows computers.

Wish Mitchel was still my student as I would vocalize my complaint directly to them. But that was back in the days when it was a responsive community .org. Not the now privatized for profit entity that Mozilla has become.

As i had to create another useless account just to submit any sort of feedback, watch as I get constant useless emails with no relevance to anything in my life, as all i wanted was a simple way to make my screen the same as it was for the past versions

I love you Firefox but what gives you the right to change/mess with my settings on my home page and make it difficult for non technical user to change back to preferred look???????? Why do you do it?

Whenever I open Firefox in my laptop, many pop up news snippets start appearing. It disturbs me and intrudes into my work. Please stop all pop ups and notifications. Thank you.

Subbiah Arunachalam

I have no idea what is happening. Whenever I try to use youtube on firefox the site just freezes. I can still scroll up and down, but nothing that wasn't already loaded loads, I can't click on anything, and nothing except scrolling does anything.

The reload, home, and even screenshot buttons don't work in these frozen youtube tabs. The only way to do anything is to open a new tab and close the frozen youtube one.

Youtube is completely unusable because of this.

I turned off every single addon, I restarted firefox, I restarted the entire computer, I tried in a private tab. It still freezes every time.

I don't have a VPN, I do not have the problem on any other website (even other media-players), and I don't have a clue what is happening.

I do have youtube premium.

Any help would be appreciated. I need to watch stuff for my studies but I just can't

Operating system: Windows 11

So, I recently updated my copy of Mozilla Firefox, and I noticed something strange. The button for the built-in VPN is disproportionately large to other buttons and clickable elements. I don't see it in the release notes, so I doubt this is an intentional design choice by the UX team, at least I hope it isn't. Any help will be greatly appreciated, as it is really distracting.

If it helps, I'm using Mozilla Firefox 151.0.2 running under GNU/Linux Debian 13 Trixie as a Flatpak.

Hi whenever I use my Google account to sign into websites (Google, ebay, YouTube, & anyother sites,) Firefox will become unresponsive, the window containing the tab i was using becomes unresponsive, sort of. - I can't click any open Firefox Tabs, - the red 'Close' radio button is greyed-out, so I can't close any tabs or the window - right-click is unresponsive, so i can't close tabs that way, but Command-W closes the tabs normally, but the others are still unresponsive.

- i can open a new Firefox window (with &/or without Tabs,) which works normally.

- & unrelated, but earlier, Firefox was running really slowly, Youtube videos were slowed down, but audio was normal, and scrolling was slow.

After the latest update, a website I use (https://compcon.app/) started throwing the following errors:

downloadable font: CFF : Failed validating CharStrings INDEX (font-family: "Helvetica Bold" style:normal weight:700 stretch:100 src index:0) source: https://compcon.app/assets/Helvetica-Bold-DaBjwqT2.otf downloadable font: CFF : Failed to parse table (font-family: "Helvetica Bold" style:normal weight:700 stretch:100 src index:0) source: https://compcon.app/assets/Helvetica-Bold-DaBjwqT2.otf downloadable font: rejected by sanitizer (font-family: "Helvetica Bold" style:normal weight:700 stretch:100 src index:0) source: https://compcon.app/assets/Helvetica-Bold-DaBjwqT2.otf

It can't load the font the website is asking it to use and is replacing it with a default one instead.

Do you know how to fix this? Either on my end or theirs?

When I try to attach file via drag & drop, the Firefox always display "Download file" as attachment. I don't know why because it properly worked before. but after some updates, drag & drop is not working.

The version of Jira at my office is not changed for years(v8.12.1#812002-sha1:7c28d59) and drag & drop is working via Chrome, Edge and etc.

I checked and borh of my Lenovo Chromebooks are running the 2026 version. Neither one will allow me to import bookkmarks . Is there a version I need other than the provided by Google?

hello my problem is widespread, recently i took my pc to shop because of some system problems, shopkeeper updated my windows 11 to newest version before update i think i had version from before 2025 i think, anyway many old programs i had saved stopped working or started to have problems if they worked, i had to instal new Firefox too because i completely lost the old one, and the problem i had while watching youtube was weird white blinking sometimes, it was very annoying, i searched online for solution and found out that i should turn off hardware acceleration, blinking stopped but now i see weird horizontal line in the middle of my screen while looking at pictures and moving them up or down or watching movie that moves up and down too, i dont mind turning acceleration back on but then resolving blinking while watching videos on Youtube my windows 11 version 25hc GPU Nvidia RTX 3060 driver updated 23.04.2026 version of driver 32.0.15.9636 firefox version 151.0.1

I had experienced the dreaded "XPCom error" and had to do a clean reinstall of Firefox (I know, I should've followed the rule of saving anything important in 3 separate locations.) I had re-logged in and noticed I didn't have any of my bookmarks or anything. Am I out of completely out of luck in this case of trying to get anything back?

On my tool bar, the VPN button seems to have grown... It does this while both off, on and even when i remove/add it to the tool bar. I use very few extensions and i don't know what could have caused it. I use windows 11.

Since updating to 151.0.1 0 on MAC OS Tahoe 26.5 , every 6 digit TOTP entered posts error - "Use another authentication method"

I use same authenticator app on Safari - no issues.

After all of those years, am I witnessing now that FF literally failing?

How could it become mysterious by that it lets user's location leaked to github even though: - third-party HiFi company VPN is active and in OpenVPN UDP/TCP, Wireguard, IPv6 On/Off, etc... - No bookmark to corresponding website - Cache and website data were so-called cleaned, - Other browsers don't give that symptom, only FF - No related plugin, out of only 3

it's impossible to find out how it lends to the language and region query of this website every time after cleaning. Is FF getting closed app?

Is that a no-way-to-explain effect of language models' evolution is exponentially higher in every 4 months after two years?