Firefox Community Forum

Since adding the recent updates for Mozilla my Bookmarks menu which was on the left side is gone. Using F10 or Ctrl does not work. Please tell me how to get it back to the left side of the screen

Firefox 138.0.1, MacOS Monterey 12.3

PDF files: settings is set to "Always ask" (see attached) However, when I click on a PDF link, and get the dialog "Open With" is grayed out, and the only option available is "Save File" (see attached screenshot). (A few weeks or months ago it all worked correctly.)

Is there a way to get "Open" working again?

I am writing to report an issue I’ve been experiencing with your browser. Despite setting the startup option to “Continue where you left off,” my open tabs are not being restored when I reopen the browser.

I have already taken the following steps to troubleshoot the issue:

   Confirmed that “Continue where you left off” is enabled in the settings

   Ensured I am not using incognito/private mode

   Disabled all extensions to rule out conflicts

   Verified that the browser is up to date

   Checked for tab recovery options in history

Even after trying all these measures, the problem persists. I kindly request your assistance in resolving this issue.

Please let me know if you require any system logs or additional information.

Thank you for your support.

After having created a couple of tab groups with some of the numerous tabs that were already open in my browser (Firefox, of course) and then closing and reopening the browser shortly after, no tabs at all reopened even though this is my normal setting for Firefox: open all previous tabs when opening firefox. This setting had always worked before - as it does now with the new tabs. However, all my previous tabs as well as the freshly created groups have vanished. Do you have an explanation and ideally a way of recovering the tabs - or the groups at least? Thank you very much. Kind regards, Kerstin

This site can’t provide a secure connectionsamagra.gov.in uses an unsupported protocol. ERR_SSL_VERSION_OR_CIPHER_MISMATCH

ye a rha hai

It nags me, that I ain't asked if I want the AI function, you just force it over me without giving me any choice, if I want it..

SO, how to COMPLETELY remove the AI function in Firefox and Linux Ubuntu..

AI scare me and I definitely don't want ANY of it!!!

I can not edit the domain address in the password save section. I can change user name and pw, but not the domain name/address. This is very annoying for sites like twitter that have now changed to x as it's not straight forward and prohibitive to my own saved information and it not allowing me to alter it in the EDIT section. Thank you for any help you can provide.

Hello,

as per description I noticed that firefox version 138 requires an ArrayBuffer as the argument of WebAssembly.compile() and doesn't allow anymore (like in 137) a SharedArrayBuffer, is this intended or it will be fixed in the future? Follows a simple test case. Kind reagards.

--- index.html --- <title>Example</title> <script> let instance = undefined; async function loadWasm() { try { const response = await fetch('./sum.wasm'); const buffer = await response.arrayBuffer(); const sharedBuffer = new SharedArrayBuffer(buffer.byteLength); const tmpView = new Uint8Array(sharedBuffer); tmpView.set(new Uint8Array(buffer)); const module = await WebAssembly.compile(sharedBuffer); instance = await WebAssembly.instantiate(module); } catch (error) { alert(`failed to compile in wasm: ${error.message}`); } } loadWasm(); function testWasm() { if (instance) alert(`sum 1 + 2 = ${instance.exports.add(1, 2)}`); else alert('invalid instance, failed to compile'); } </script> <button onclick="testWasm()">Press to run wasm function (sum)</button> --- ---

--- sum.wat --- (to convert into .wasm using: wat2wasm sum.wat -o sum.wasm) (module (func $add (param $lhs i32) (param $rhs i32) (result i32) local.get $lhs local.get $rhs i32.add) (export "add" (func $add)) ) --- ---

Using 2025-04 Cumulative Update Preview for Windows 10 Version 22H2 for x64-based Systems (KB5055612) Firefox 138.0.1 (64-bit) and says it is up todate. I have looked at the about:config to find the browser.tabs.remote.autostart but it does not exist in the list of processes. I have also unchecked in settings both performance options intermitently to try and correct this problem, but nothing happens: (unchecked) Use recommended performance settings Learn more These settings are tailored to your computer’s hardware and operating system. (Unchecked) Use hardware acceleration when available Nothing pops up to allow choosing a different number as many support articles say. I have AdBlocker running as an add on and turned off the duck duck go privacy essentials and still nothing stops these insane amount of processes clogging up my computer. right now, on this page there is only this tab open and there are 13 processes running. Please send real fix instructions- thank you

We want to use Firefox on a locked down system. Using the -kiosk command line argument gets us most of the way there. But they still have access to the devtools when they hit F12. It appears there are ways to disable devtools after the browser has been started. How can we disable the devtools before the browser is opened and without registry changes?

Yesterday evening I accidentally clicked on a setting that asked me to stop or deny something and I don't remember what it was. Today my bookmarks and history prior to yesterday evening is gone. Is there a way in the system to go back to yesterday evening and undo whatever I clicked and restore the missing history and bookmarks? I work on MacOS and am using the current version of Firefox 137.0.2 (64-bit)