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First, apologies if this is the wrong forum. This is about the FF Developer edition browser.

It used to show the browser width counter in the top right corner when you resized it. Now in the latest version I no longer see this. How can I get this back? It's a great feature!

Attached is what it used to look like. I don't know what version it appeared in and which it disappeared in.

Thanks!

Sending of the message failed. An error occurred while sending mail. The mail server responded: <anonymous@[10.0.0.31]>: Sender address rejected: not owned by user a1.914306843. Please check the message recipient "christine.krieger@a1.net" and try again.

why do I get this on new download

When I try to print a PDF attachment it comes out as a blank sheet. This used to work OK. The print preview is fine. I have altered the settings to open PDFs in acrobat as a workaround. Any help appreciated.

I am using Firefox Developer Edition version 154.0b5 (latest according to settings) and when I try double clicking or use ctrl + A, the url won't be selected (or parts of it if I try something selecting something specific). Double clicking doesn't work at all.

Is this a bug?

Using 153.0b3 and having an issue.

Under Account Settings, I have three entries in the left: Company Yahoo Local Folders

Under Company, my POP3 download/remove from server account I've had since the 90s, under Copies & Folders I have "Place a copy in" for "Sent" Folder on: Company. Same for Message Archives, Drafts, and Templates. Under Yahoo I have "Place a copy in" for "Local Folders" for all four. The ONLY reason I have them set up this way is due to the error message that displays if I try and set any of them to be Yahoo.

I recently went to find an email I'd sent last week using my Company account and couldn't find it. I couldn't find any that had been sent for awhile. I eventually found it under Local Folders(I had "Hide local folders" turned on because I can't understand the reason to it to even exist).

What exactly is going on? Is it a bug with the beta? I'm getting really tired of having to move the messages to the correct folder when all of the settings appear correct(my oldest email is from 1996 btw, so I've been keeping current since Netscape Mail)

Still having issues with Thunderbird on my Windows 11 laptop. I tried reinstalling the program but still locks up. Any suggestions or comments would be appreciated Thanks Dave

The latest update for the beta version 153.0b1 of 6/16/26 has made my theme stop working although it still says enabled. The theme is: ANIMATED Sakura by candelora 🌸 Theme Designed by candelora © 🌸 Animated Apng Theme I'm using Windows 11 on a Lenovo IdeaPad Flex with Firefox as my default browser. I'm an old lady, not tech-enabled in any way. Please help and thanks.

I don’t see the translation option in the menu. I am running latest Firefox (148) on iOS Translation used to work yesterday

This is supposed to be available according to this https://support.mozilla.org/en-US/kb/translate-firefox-ios

I installed Firefox Developer Edition and I am having the following issues, whenever I go to Indeed and I go to a job posting the browser opens up additional tabs without my permission or me doing so. Also the browser does the same in Canvas when I go to my course the browser automatically opens up new tabs without my permission and also me doing so. The Firefox Developer Edition browser update is Firefox Developer Edition is up to date 152.0b7 (64 bit). The following extensions are installed AdBlocker Ultimate, FoxyProxy Basic, Ghostery AdBlocker For Privacy, Malwarebytes Browser Guard, Privacy Badger, and UBlock Origin. This behavior got super annoying and I don't know how to fix it. Any help on how to fix this would be appreciated. My operating system is Windows 11.

I'm a beta update channel user, so this may not reflect what 'normal' users are seeing. I use Firefox in Linux, debian v13, so normal people that are using Windows or MacOS also might not see the changes I'm asking about? -- I have no way of knowing.

Anyway: in FF v152.0b6, the "Connection Settings" area seems to have disappeared entirely from the settings menu. I used this area of the settings frequently.

The ability to set proxy still exists in the about:config settings area. In the future, will about:config be the standard place to go for people that want to manually set (or toggle) an http/https proxy?

Thanks for reading, and thanks to all the Volunteers who make this place and Mozilla software function. I use your stuff all day, every day, and my life is better because of it.

All my Tabs Group have disappeared from the Tab Bar. I can see the Closed Tab Groups in the drop down but i can't find a way to re-open Closed Tab Groups. Any clues welcome. Running 146.0 and on the beta update channel.

I have closed my Rogers account and have opened a Wightman account. Before I closed the Rogers account I downloaded Thunderbird and transferred my e mails and contacts to Thunderbird. To do that I had to put in my Rogers address. Now, when I open Thunderbird or try to send a message from Thunderbird, a pop up asks me to sign in to the old Rogers account. As this account is no longer active I cannot use Thunderbird. I have tried to change the information from Thunderbird E mail but cannot get it to change. My new e mail address is martinwea@wightman.ca Please help me to make Thunderbird work properly! Martin

Сегодня 23.04.2026, я открываю браузер и вижу, что моя строка и ярлыки находятся сверху, а не в центре(1 скриншот). Вчера 22.04.2026 все было хорошо, я покажу на 2 скрине как это должно выглядеть. Хочу заметить что у меня включена функция Handoff и она мне удобна, но мне неприятно видеть блок с ярлыками и строкой не по центру. Я использую тему ffultima, скажу еще раз, вчера все было нормально. Версия фаерфаокса у меня - firefox developer edition

So, forgive me, I'm a little frustrated right now, but I needed to move an Open Tab to it's own window, without the use of my mouse (yes, it's having issues right now), but: I used to do this by tabbing to the TAB in question and pressing <Shift> F10, which opened a context menu with a Move To sub-menu. Now the menu didn't have that option. see pic below. ...Yes, I was able to do the same via, File | New Window, and coping the address to it with Windows cut/paste and <Alt><Tab>. Still I would like to know how to get to the TAB context menu option without the mouse.

Moderator note: this question has been edited to correct the formatting.