Firefox Community Forum

For example, this code in userChrome.css will work for showing a custom favicon on the bookmarks toolbar:

.bookmark-item[label="Bookmark"] image {

   width:0!important;
   height:0!important;
   padding: 0 0 16px 16px !important;
   background:url(custom-icon.png)!important; 
   background-size: 16px !important;

}

However, after a recent update, if the bookmark is located inside a folder, the custom favicon will not be displayed and it will revert to the websites favicon.

See the attached image example of a bookmark on the toolbar vs. inside a folder.

ブラウザゲームサイトUnityroomなどでゲームを遊んでいると、Cookieの容量が10ギガバイトを超えることがよくあります。 どうやら10ギガバイト以上のcookieをFirefoxでは保存できないようです。 FirefoxでのCookieの容量を10ギガバイト以上にしたり、ページごとに個別に管理できるようにしてほしいです。

For the past few weeks, I have been intermittently but stubbornly getting the beachball of death when I open Firefox, coupled with Force Quit. Sometimes I force quit and then restart and it's fine. Sometimes I force quiet repeatedly and it continues not to open. Sometimes I restart my laptop and that fixes it, but sometimes not.

I do have a lot of tabs open, but i have always had a lot of tabs open. This thing is new.

What could have changed? What do I need to do, fix, trash, or curse?

(In simple language, like for your unsavvy grandma please?)

So my question is Firefox is on my Cent OS 10 machine and it only shows the close button on the upper right corner, I would like to know two things, 1. How to add the Minimize, Fullscreen buttons to just the close button on the upper right corner. 2. How to get my menu bar back - the home button and all of the other goodies that normally show on the left of the browser just above the Forward, back and refresh buttons?

Thanks in advance for the help.

So, whenever you open/close the application menu, it fades in/out respectively. It's super disgusting I don't even know why it's not disabled when I have animation effects turned off on Windows. like bruh

This actually happens on multiple UI thingies, I just realized. -_- So if there's a way to disable all these terrible things I'm open to it. (ignore the reply i made, i didn't realize i can edit my question 😹)

i used to be able to scroll down in full screen and with the new version i can't and i used to be able to see the queue list and now i can't !!

How can i get the older version cause this one i really don't like

I recently got a new computer running W11. As always, the first thing I did was download Firefox and set it to my default browser. Then I logged in and synced. Firefox picked up some things - like my passwords, but not a single instance of history, not a single bookmark, or the tiles of frequent websites seen on the new tab page. Thinking something had gone wrong, I uninstalled FF and then reinstalled it. No change. As I was researching what to do when FF syncing fails, I realized that FF is not saving any data in history. NONE. I fiddled around with this situation for about five hours and it showed NO history of websites/pages visited. I went to a few common websites by name, typing www.ebay.com into the search bar (for example) and since that was a website I had now "frequented" I expected it to show up as a tile in the new tab page, but it didn't, even after closing it and opening it several more times to demonstrate (to FF) its frequent-ness.

What could be causing all this? I assume some settings in about:config are off, but can't find any information searching the web. No matter how I state the question, I only get responses like what to do if FF doesn't sync, NOT what to do if FF doesn't collect any history. Honestly, this is a standalone private home computer. It doesn't actually HAVE to sync with work. But it's not very useful to have a browser that collects NO history.

Sorry this is so long, and may I say, any help will be seriously appreciated.

As of yesterday, Oct. 14, 2025, everything in my Firefox Bookmarks and History is gone. This is the message displayed: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." I have tried to recover them by different suggested means, but it would appear there is NOTHING to recover. Everything in Bookmarks says EMPTY, and I can no longer save any new Bookmarks, it just not allowed. How and why did this happen, and what am I supposed to do? I had hundreds of things Bookmarked, many of them were important to how I run my business, and now are seemingly all gone. This is very upsetting and would appreciate Mozilla getting this straighten out. I need and explanation and resolution.

How can I bring my bookmark toolbar back? It is on my Eset firefox page, but not on my firefox page. I'm running out of ways to get my bookmark pages back. Yes, I updated to Windows 11, now, I'm thinking that was a bad mistake. Help??? Thank you. Linda

On my windows 11 machine, Firefox requires me to re-log into my Mozilla account every few days (there is a yellow triangle on the Account extension, which when clicked, has me to log into my Mozilla account). I have tried several troubleshooting steps:

1) Create a new profile and set it as the default profile 2) Completely uninstall and reinstall Firefox using the steps in the following article, including removing user data. https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer

I'm using Firefox on a Mac and my iPhone and I don't experience this issue. I am logged into my account on both devices.

Thanks,

Paolo

while watching YouTube in direct mode ... F revert back to normal mode every time new advertisement cut into the flow I have to reselect picture-in-picture mode. Will work reliably till new advertisement

This morning, Firefox updated automatically to Firefox 144. However, this update completely broke Firefox; every tab crashed, and I couldn't even use Firefox to get to this help site.

Edition Windows 10 Enterprise Version 22H2 Installed on ‎03/‎25/‎2022 OS Build 19045.6332

Changing my OS is not an option for me; those decisions are made far, far away. I was allowed to use Firefox instead of Chrome. Sadly, I have to switch over to Chrome today in order to work.  :(

I have added a couple of screenshots.

I am moving over to Chrome to do some work.

Thanks for any help, B

I have WhatsApp Web pinned as a tab in Firefox, and other than that I also have a home page. Normally when I launched Firefox, only one window would open and it would have both the pinned whatsapp tab and the homepage in another tab.

Since today, now when I launch Firefox it opens two separate windows. One window only contains the pinned WhatsApp Web tab, and the other window contains the home page.

How can I make it so that when I launch Firefox only one window opens that contains both tabs? Please don't tell me this option has been inadvertently removed.... Thanks.