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Hi,

I’ve noticed that Firefox on my Android phone becomes noticeably slow whenever I open certain video or streaming pages. The browser doesn’t crash, but the page takes a long time to respond, and scrolling becomes choppy until the video fully loads.

I’ve tried clearing the cache, disabling add-ons, and testing on both Wi-Fi and mobile data. The issue only seems to happen on Firefox — the same sites load smoothly on other browsers.

Is this a known performance limitation, or is there something in the settings I should adjust? I’m not sure if it’s related to media decoding or just heavy websites.

Thanks for any guidance.

I must have changed something because T'Bird no longer starts. I was trying to copy TB file from Win 10 to a Win 11 PC. That failed because some files could not be copied. But now TB is not starting up. I checked the Start folder and it is in there.

Suggestions please.

in the last three days or so, the pop up window in FF where I would find the copy, paste etc has its script disapearing. it shows some space in black, and if I hit it just right I can still open a new window for example, even tho the script for that programming is no longer there. does anybody have an idea? I am fully updated mint user, it is starting to be bother some, do I need to deinstall/reinstally?, I would prefer not to, sigh, but I certainly wouldn't want to do it if it won't fix the issue Thank you for any suggestions

Hello. Although I have configured the page translation settings, the pages are not automatically translated. It may be possible with the help of Please help me solve this problem.

I have just started getting this error message when sending email from my @live.ca account. I do not get this message when sending from a @gmail or @company.ca address.

Quote: "Sending of the message failed. An error occurred while sending mail. The mail server responded: Non-Compliant sender address. Code : -1. Please check the message and try again."

I can send and receive email using this address from my Android phone or from my Windows eMail client, so why is Thunderbird causing this? I have looked through all the setting and cannot find anything different from the settings for the @gmail accounts.

Thanks. Dave

Hello Everyone,

Background: Using Thunderbird for almost an year and extremely happy with the product set. I use it to access GMAIL via POP and use the settings "After the email gets downloaded to my computer, delete the GMAIL copy" (Settings attached).

My usage pattern which changed recently: Earlier, I will always download emails using Thunderbird every day and it was working perfectly. Recently I have to travel for few days and during those days I will access my GMAIL via my android mobile primarily and I download all the emails after my return.

Current Issue: Now after I return, all the mails gets downloaded, but it does not get deleted at GMail side (online). From the time I started using Thunderbird after my return, the newer emails from that time are getting downloaded and deleted but the old emails stay in GMail. Current inconvenience is it takes time to validate if all the important emails are downloaded and I cleanup the GMAIL manually and then we are all in sync. This continues until my next travel. I tried resetting the GMAIL POP settings and there is no improvement.

Any pointers or suggestions to resolve will be gladly appreciated. Thanks in advance!

Hi there. i have here one chinese tablet and i want to install it firefox but cannot login to Google Play store because i see error for the browser. i want install it firefox and set firefox as default so i can log into Google play store.

thanks in advance

1. 1. Environment

- **iOS Device**: iPhone with Firefox for iOS (latest version) - **PC**: Windows 11, Firefox 133.0 (latest stable) - **Account**: Same Mozilla account on both devices (verified) - **Sync Settings**: All sync options enabled on both devices, including "Open Tabs"

1. 1. Problem Description

I'm experiencing an issue where "Open Tabs" sync is not working between my iOS Firefox and Windows PC Firefox, despite all other sync features working correctly.

• • What works:**

- History syncs perfectly between iOS and Windows - Bookmarks sync correctly - Account is properly connected (confirmed via QR code pairing) - "Device connected" confirmation was shown after pairing

• • What doesn't work:**

- When I go to `about:firefoxview#syncedtabs` ("Tabs from other devices") on Windows PC, it shows "どこからでもタブを取り出す" (Get tabs from anywhere) with no devices listed - The iOS device does not appear in the synced tabs list - Even though the same tabs appear in History (proving sync connection works), they don't appear in "Tabs from other devices"

1. 1. Steps Already Taken

1. Verified same Mozilla account on both devices 2. Verified "Open Tabs" sync is enabled on both iOS and Windows 3. Performed QR code pairing - received "Device connected" confirmation 4. Manually triggered sync on both devices 5. Checked History - it syncs correctly (tabs I opened on iOS appear in PC's history) 6. Waited several hours for sync to complete 7. Restarted Firefox on both devices

1. 1. Expected Behavior

Tabs open on iOS Firefox should appear in Windows Firefox under "Tabs from other devices" (about:firefoxview#syncedtabs).

1. 1. Actual Behavior

- History shows the tabs (proving sync works) - "Tabs from other devices" shows no devices and no tabs - iOS device is not recognized as a synced device for tab sharing

1. 1. Question

Is this a known issue with Firefox for iOS and Open Tabs sync? Is there a way to fix this, or is this feature not fully supported on iOS?

Thank you for your help.

Dear developers,

I want to share a user story for Firefox iOS. When I am in offline mode (when having no network), in some cases I have time to check my open tabs. In the tab preview, the content of the tabs is visible so there might be some kind of cache. When clicking on the tabs, the tab try‘s to reload automatically and the error „no network connection“ is thrown. Would it be possible to open the tab in cache to show the historical content of it when no network is available?

Thanks, Michael

On a 15" tablet, it would be nice to see the imap folders permanently, so i could drag emails to them. Im a librarian and i like to have a nice structured subject ordered inbox. But i cant find any ways to fix the folders list to the left side..

Hi community The option to set, how many rows of shortcuts should be visible on the Firefox start screen, is a good idea. E.g. I set 3 rows and fill them with relevant shortcuts. The shortcuts in the bottom row always changes when I visit several websites. My understanding is: Setting the shortcuts as necessary and that's it! Wtf happens, that the last row changes all the time, that makes me fussy. regards wolf

Social Security just stopped me from downloading my 2026 COLA on Firefox with an error 400 (bad request), but I was able to do it on Edge. More and more websites, particularly financial and government websites, work with Edge but not Firefox. And when I call their customer services, their first response is "try another browser!" Why do they hate Firefox?

If someone wants me to walk them through an example of the problem(s), I can do that when I pull statements or pay bills on those websites. The worst example is Synchrony Bank, which runs several credit cards I use. You may contact me by email at [email removed]@att.net (put FIREFOX PROBLEM in the title so I don't miss it).

I also have Mozilla VPN, and some things only work when I turn off the VPN, so that may be compounding the incompatibility. Although I am in Eugene (OR), the closest location for my VPN is Seattle.

I've been using Firefox for decades without any problems. Still on Windows 10. The last update 'made' my bookmarks 'disappear'. I can see all the backups, but somehow they can't be reloaded. Worse, can't even reload my own earlier backup (HTML format). I've tried all available tricks to no avail.

Craigslist/Spokane turns on and off https://spokane.craigslist.org/location/spokane-wa?lat=47.6589&lon=-117.425&search_distance=60

I use a Lenovo Legion 5 laptop pc and a second Samsung monitor. When the screens go to sleep with Firefox open on the second monitor, the second screen will not wake up again instantly. It can take up to 5 minutes or only after rebooting.

When I close the Firefox window on the second screen from the taskbar on the laptop, the second screen lights up again.

Any ideas?

Thanks!

I need to find out why Firefox won't open anymore. A pop-up window says it is trying to install a new helper tool but it won't accept the password I use. This is on a Mac M2 with OS 15.4.1