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Hi, for some reason firefox has begin crashing this past week, when I'm on Soundcloud and I press the play button. Today it also crashes when I try to by a bus ticket on Flixbus.dk, this has not happened before.

I looked up the troubleshooting page concerning crashes and I tried to go on the sites in troubleshoot mode, it still crashes.

I have the reports here: bp-df051f75-8783-417f-98c1-f75b90250325

bp-c87b457c-be5c-409a-87cf-ad9f30250325

I believe the first one is for Soundcloud, the second one is for Flixbus.

Thank you!

I have Yandex Calendar enabled on a Windows computer using CalDAV in two applications - Thunderbird and OneCalendar. On an android phone, Yandex Calendar is enabled in the Yandex Calendar app.

Android App <--> [Yandex] <--> Thunderbird Calendar (Windows)

                                            <--> OneCalendar (Windows)

When I create an event in the Yandex Calendar app for Android, they are visible in the calendar web interface, they are visible in OneCalendar on a Windows computer, but not visible in the Thunderbird calendar on a Windows computer. All other events created in the apps and web interface are visible in the Thunderbird calendar. All CalDAV connection settings in Thunderbird and OneCalendar are the same

I would be very grateful for any advice to solve this problem.

I'm experiencing an issue with how my e-commerce website displays on Firefox. One of my product pages, featuring Beconase Nasal Spray, seems to load slower or display incorrectly compared to other browsers. Has anyone faced similar issues with Firefox rendering? Are there any specific settings or compatibility tips I should check to ensure a smoother user experience?

Hello. This question concerns the Windows 11 desktop version of Firefox.

I have long used the Home and End keys on my extended keyboard to scroll to the very top of any given page in Firefox (Home) or to the very bottom of that page (End).

But, lately, I notice that, for no reason I can figure out, Firefox no longer responds to those shortcuts. Now, when I tap Home or End, the page may, at first, scroll up or down slightly but not to the top or bottom. If I press Home or End again, nothing happens at all.

Sometimes, if I press Ctrl + Home simultaneously or Ctrl + End the page will scroll to the top or bottom respectively.

Why has Firefox's behavior apparently changed? Is there an issue with my keyboard or operating system settings? (I use a Logitech G915 keyboard.)

Please let me know how to restore Firefox's shortcut functionality, where I can tap just Home to scroll to the top of a page or only End to scroll to the bottom of a page.

Thanks and be well.

The other day I discovered all my extensions have been disabled. I have an old Mac and am not able to upgrade to a newer version of Firefox. Is Mozilla going to offer a solution for people like me who find their preferred browser to now be frustrating and inefficient? I would love to restore my add-ons. Thank you.

After updating to v 133.0, when maximizing Firefox (not F11 fullscreen), a taskbar that is set to "auto-hide" will no longer unhide when mousing to the bottom of the screen. This did not occur with the previous version (132.0.2).

This behavior is also unaffected by the "devtools.toolbox.alwaysOnTop" setting in about:config as i've tried switching from the default "true" to "false".

Update: Still persists in 136.0.2

Every 2 to 3 weeks the Thunderbird Calendar gets wiped out, ie all entries deleted. Once it occurred right after an update. A few hours later it will reappear. Why does this happen and what's the remedy to stop this?

I was in the process of writing a somewhat lengthy response and went to another webpage or webpages and when I went back to the webpage where I was writing the somewhat lengthy response, the webpage was completely blank! The Back and Forward buttons were grayed out, Refreshing the webpage did nothing so there was NO way to get the webpage back. Interestingly, when I hover over the URL, at the end of the URL for the webpage, it had "about:blank." Things like this are very frustrating and waste a lot of my time.

In addition, another problem I reported on 3/20/25 (link is: A webpage I just closed recently is not listed Back arrow issue) has still no response.

Also another frustrating thing about the Firefox browser is that at times the Bookmarks sidebar disappears.

I need a reliable browser, not one that sort of works! I request that these issues be addressed soon.

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I'm new to using the Thunderbird email client but I find the UI very sluggish and almost unusable compared to Outlook email for MAC.

Running on mac osx 12.7.6. Anything I can try to speed things up.

4 days ago, the calendar app suddenly stopped working. If I try to add an event, it sends an error message saying 'An error occurred when writing to the calendar Sandra Kanfer Clarke! Please see below for more information.' and tells me 'modification_failed' and that 'If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.' At this point, the calendar switches itself to 'read only' and I get the exclamation mark and triangle saying this calendar is momentarily not available. This is a synced Google Calendar that has been running on Thunderbird for several years without any problems. I uninstalled the calendar and reinstalled it, I uninstalled Thunderbird and reinstalled it - none of it makes any difference.

For some weeks I have ad an issue with Firefox using 50%-100% of CPU. Normally it is the Firefox process itself, sometimes it is also "Privileged Cont".

OS is Kubuntu 24.04. Firefox has done this across 2-3 versions.

Things I have tried:

Restarting Firefox No change, I'll even get 100% cpu usage with no tabs open

Refresh Firefox to remove settings and addons No change

Uninstall Snap and try direct Apt package No change

Remove ~/.mozilla to fully remove any residual settings/cache/etc No change

Try with and without hardware acceleration See: https://support.mozilla.org/en-US/questions/1308215 No change!

I would blame my old computer hardware, but Brave runs fine. I am now using Brave, but would dearly like to return to Firefox as I miss containers, and I don't support a chromium dominated web.

Hello, I have an empty space on the toolbar between the "New Tab" button and the "Minimize Window" button in Firefox. Is there a way to remove or reduce this space to make better use of the available space? Any help would be appreciated! Thanks.

Hey everyone,

I’ve been using FL Studio on Android FL Studio on PC, and I noticed that when I have Firefox open, the performance seems to drop—especially when playing back complex projects. Sometimes, the audio crackles or lags when I switch between FL Studio and Firefox.

I’ve checked my system resources, and Firefox does seem to use a fair amount of RAM and CPU, but I’m wondering if there’s a specific setting in Firefox that could help reduce this issue. Has anyone else experienced this? Any tips for optimizing Firefox so it doesn’t interfere with FL Studio’s performance?

Would appreciate any advice! Thanks.

Since a couple of days I have the follwing 2 problems: 1. I can't update my google calendar from TB and changes made in the android doesn't show in TB 2. The message moving function doesn't work. Messages disappear from the inbox but wont show in the folders where they should have been moved to.

I have TB 128.8.1esr(32-bit)

After the latest Firefox update, Subtitles and closed captions not saving settings in latest Firefox in spite of resets, reboots, clearing cache. Appears to be on Windows 11 but is fine in Windows 10.