All Products Community Forum

I have an samsung s26 ultra, and I have all the configuration correctly, but when I receive a email app does sync automatically and it never show me notifications, I must open app an manually sync

I cannot get into Firefox due to an error message that keeps coming up. Your Firefox profile cannot be loaded. It may be missing or inaccessible.

I have tried deleting and reinstalling it, but it didn't really uninstall completely. I have tried a few suggestions from online, which didn't work. I also tried right clicking on the Firefox symbol and went into some of the different options, but nothing worked for me.

I had have an iPad Pro running the latest IOS 26 and Firefox Focus. When I fire it up, if I have my keyboard attached, the cursor appears briefly for a second and then disappears. It’s like the cursor focus leaves the URL area of the browser.

If I disconnect my keyboard, I can click in there and use the on screen keyboard. Once I do that and enter anything [and hit enter], then it will work from that point. So this appears to only affect initial use of the app. I can click up there and type anything after that first submission and it works.

I suppose this is a kind of support question, of sorts, but in my opinion this also has to be treated as a complaint, in a sense.

About one and a half months ago, Firefox became unresponsive, that is, it became awfully slow. I experienced just about every issue with the browser that was mentioned in the following support pages and support issues (posted by others) and I read all of those :

Websites don't load - troubleshoot and fix error messages

https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors#w_the-problem-only-happens-with-certain-websites

firefox is extremely slow or fails to load sites

https://support.mozilla.org/en-US/questions/1550371

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Secure connection and security warning error pages in Firefox https://support.mozilla.org/en-US/kb/secure-connection-failed-firefox-did-not-connect

An oddball situation had occurred in which I couldn't for the likes of me go to my librarything.com homepage at each restart of the previous Firefox session, which also causes lagging when the session wants to connect to the other (normally unproblematic) website session tabs, and I also get multiple connection errors + insecure connection notifications for some of these websites. (sometimes refreshing a page does not help, sometimes it does)

I got bored reading all those support pages and trying out the solutions, because nothing seemed to help. In the long run, I decided to de-install the whole browser after backing up bookmarks, speeddial settings, passwords and the whole profile. Simultaneously, I also tested the connectivity to these websites in another browser (Brave) and this did not present me with any problem.

So I did the following :

1) deleted the whole cache and closed the browser 2) uninstalled FF with Revo Uninstaller (which has an option to remove all remnant files / folders/ registry items on the Hard Drive) 3) made sure to remove all cached leftovers from HD by using multiple cleanup tools in succession : 1) Wise Disk Cleaner followed by 2) Bleachbit followed by 3) CCleaner

Went to the mozilla website, downloaded and installed the last version of FF. Next, imported bookmarks, speeddial settings and passwords. Next, reinstalled the Firefox extensions I used before (without any lag until one and a half months ago). I also did NOT copy the stored profile but decided on starting afresh with a new profile.

Everything worked lightning fast and efficiently until a few days ago, when I received an automatic update of Firefox - 151.0.3 - and all of a sudden, the same problems are reoccurring. And again, I can't connect to an unproblematic website like librarything.com, whereas before the update I was able to without any problem !!!

What the hell is going on with these auto-updates ???

Hallo, ich habe vorgestern ein neues Win11 aufgesetzt und dann die neueste Version von Thunderbird installiert. Mir ist jetzt aufgefallen das sich die E-Mails nur mit einem Doppelklick öffnen lassen und das dafür ein neues Fenster aufgeht. Früher waren die Mails mit einem Klick zu öffnen und der Inhalt wurde auch direkt unter der Mail angezeigt . In den Einstellung steht der Doppelklick nicht in der Auswahl sondern als einzige Möglichkeit. Gibt es da irgendeine Möglichkeit um das anders einzustellen, einfacher Klick und direktes anzeigen ohne extra Fenster? MfG

Hello, the day before yesterday I set up a new Win11 and then installed the latest version of Thunderbird. I have now noticed that emails can only be opened with a double click and that this opens a new window. Previously, emails could be opened with a single click and the content was also displayed directly below the email. In the settings, double click is not in the selection but is the only option. Is there any way to set it differently, single click and direct display without an extra window? Best regards

Since we had service to our router and modem, I have been receiving a notice "Secure Connection Failed" whenever I click on a link. It states that something is too long. What can I do to resolve this situation as some of the links are important. I would appreciate your help. Thanks!

When I try to send an email, I get the following response. Sending of the message failed. An error occurred while sending mail. The mail server responded: invalid user ID or password. Please verify that your email address is correct in your account settings and try again. Have looked in account settings and cannot see a password anywhere. Email address is correct Help please Carol

Yes, I'd like to use the same account on both of my profiles.

I understand that for some users, this may be confusing.

In my case, the only reason for different profiles is that I need to use a Proxy Server for some websites, and no proxy for other websites. Manually switching proxy settings is painful, and doing so causes traffic for my other tabs/windows to go to the proxy, which I do not want.

I have a main (set of) windows (and its tabs) going straight to the internet, then I have a separate window (and its tabs) configured to go through a proxy (SOCKS5 in this case). I want all other settings, bookmarks, passwords, etc. to be identical to both. I end up having to logout of my main profile, log into the other profile to sync settings, log out of there, and log back into my main profile.

Is there a valid technical reason why an account on the same FireFox installation cannot be shared between two profiles?

I can do this on multiple computers (same account, different computers/profile), seems odd it is restricted to not allow on the same computer.

I have an alternative solution: Install FireFox natively, then install FireFox as AUR or FlatPak, but not sure this will collide as this both uses the same profile directory. Hum...

Wayne

Hola, he necesitado una forma de convertir un archivo .jsonlz4 a .json de forma online o que ponga en riesgo lo menos posible mi PC (evitando descargar y ejecutar, largos código que requieren de herramientas de terceros como Python, etc.), y he encontrado un sitio web que no me ha servido porque mi archivo .jsonlz4 era lo suficientemente grande como para dejar la página web congelada teniendo que esperar una larga cantidad de tiempo), este post es simplemente para ayudar a la comunidad que busca una solución a esto en 2026 (hay una versión de 2015 en el foro que utiliza la inferfaz IFilePicker que ya no funciona en las versiones actuales de Firefox):

• (solución antigua, 2015): [https://support.mozilla.org/es/questi.../1071533]
• (solución online, para archivos pequeños): https://convert.guru/es/convertidor-de-jsonlz4
• (solución mía propio, 2026):

1. Escribe "about:config" en la barra de direcciones de Firefox.
2. Busca "devtools.chrome.enabled".
3. Asegúrate de que esté en "true" (doble clic para cambiar si es necesario).
4. Código que debes pegar en la consola de Firefox (Shift+Ctrl+J):

--- // (Bourdait, 2026) Script de Firefox para convertir archivos .jsonlz4 a .json (descomprimido) desde consola de FF (async () => {

 // 1. Verificar configuración necesaria
 if (!Services.prefs.getBoolPref("devtools.chrome.enabled", false)) {

console.warn("ADVERTENCIA: 'devtools.chrome.enabled' es falso. El selector de archivos podría fallar."); console.warn("Ve a about:config y pon devtools.chrome.enabled en true si tienes problemas.");

 }
 let filePath = null;
 // 2. Selector de Archivos (Intento XPCOM con fallback)
 try {

// Intento utilizar el filepicker nativo (aún funciona en consola privilegiada en muchas versiones) const fp = Cc["@mozilla.org/filepicker;1"]?.createInstance(Ci.nsIFilePicker); if (fp) { // Nota: En versiones muy recientes (FireFox 125+), a veces requiere window.browsingContext try { fp.init(window.browsingContext || window, "Seleccionar archivo jsonlz4", Ci.nsIFilePicker.modeOpen); } catch (e) { fp.init(window, "Seleccionar archivo jsonlz4", Ci.nsIFilePicker.modeOpen); } fp.appendFilter("Archivos jsonlz4", "*.jsonlz4"); fp.appendFilter("Todos los archivos", "*.*"); // Esperar la selección const result = await new Promise(resolve => fp.open(resolve)); if (result === Ci.nsIFilePicker.returnOK && fp.file) { filePath = fp.file.path; } }

 } catch (e) {

console.error("El selector XPCOM falló:", e.message); // Fallback manual filePath = prompt("El selector automático no funcionó. Pega la RUTA COMPLETA del archivo .jsonlz4:", ""); if (!filePath || !filePath.endsWith(".jsonlz4")) return;

 }
 if (!filePath) return;
 const outputFile = filePath.replace(".jsonlz4", "_convertido.json");
 try {

console.log("Leyendo y descomprimiendo:", filePath); // 3. LECTURA Y DESCOMPRESIÓN CORRECTA // IOUtils es global, NO se importa. // El truco está en la opción { decompress: true } const content = await IOUtils.readUTF8(filePath, { decompress: true }); console.log("Guardando archivo JSON:", outputFile); // 4. ESCRITURA DEL ARCHIVO await IOUtils.writeUTF8(outputFile, content); console.log("Archivo guardado en:", outputFile); alert("Conversión completa.\nArchivo guardado en:\n" + outputFile); // Opcional: Abrir el resultado en una nueva pestaña const fileObj = Services.io.newFile(Services.io.newFile(outputFile)); // Corrección de ruta // Método más seguro para abrir archivo local en Firefox moderno: const url = Services.io.newFileURI(Services.io.newFile(outputFile)).spec; window.open(url, "_blank");

 } catch (err) {

console.error("Error crítico:", err); alert("Error al procesar el archivo:\n" + err.message + "\n\nAsegúrate de que la ruta es correcta y el archivo no está corrupto.");

 }

})(); ---

NOTA: Aunque el script muestre algún error comprueba el archivo, a veces aparece algún error pero ha convertido el archivo perfectamente.

La única intención de compartir el script es ayudar a otros y hacer crecer la comunidad.

Un saludo.

the default font for writing texts is too small for me to easily read. Yet when I send the message the text size too large, How do I control these font sizes independently

Hi I use Firefox for years (decades probably). How on earth is it possible that after an upgrade (to 151), I had to manipulate about:config in order to allow unsigned extensions to keep working? Of course, I am not dealing with DIY extensions, but with small and unknown extensions as AdBlocker or uBlock origin... It doesn't seem I am the only one... Any explanation will be warmly accepted...

So what exactly should I do to rectify this problem . I just to reiterate the problem is that applications will not open when I try to open them.Because it says the Javascript is not running.Yeah, my setting.It says it is everything is updated and up to date so i'm lost on what to do.

Content Security policy blocks essential scripts no matter what I do.

It's new Firefox installation, Troubleshoot mode, Enhanced tracking disabled, I'm not on VPN, can log into X.com in another browser just fine.

It's the reason #1 I don't use Firefox. I thought the issue would be fixed but it has been like this for long time.

Yet whatever I do, whatever I turn off this pops up:

Content-Security-Policy: The page’s settings blocked the loading of a resource (default-src) at https://abs.twimg.com/responsive-web/client-web/bundle.Conversation.721fc4aa.js because it violates the following directive: “default-src 'self'”

The screenshot is from Zen, but it uses Firefox and the issue is the same in Firefox.

I setup an address book for a club so I can send BCC emails but it won't use the club address book! I had one in my old computer. So I try to send an email, click BCC and start typing the club name and it doesn't appear! In my previous computer it would find the club address book and insert it in the BCC line! This new one doesn't do that!

Today when I started Thunderbird two of my email accounts are Highlighted in RED with a RED Triangle at the end of the email address.

Both accounts are from Spectrum. My other email accounts from another provider are OKAY.

I am not able to retrieve or send emails on these two accounts. I can get my emails from both accounts when I use Spectrum Webmail. So it looks like the account information is correct.

How do I fix this?