Firefox Community Forum

After a Firefox update, my bookmarks menu, which was on the left side of the screen vanished. I have not been able to restore it. When I click the bookmark box (at the top of the page) I get three choices showing up on the upper left side of the screen. 1) Summarize , brainstorm, etc. 2) Tabs from other devices. and 3) History. So how do I get bookmarks???

TNX, Bob

My problem is as described in the subject line: I'm getting multiple instances of Firefox opened when I click links from email or web pages.

This just started happening within the last couple of days. In the past, whenever I opened a link a new window was opened in the already open instance of Firefox. Somehow some setting has been changed (a guess) that has caused a change in behavior.

Firefox is my default browser, but I do keep Chrome open for some testing of HTML/CSS I'm writing. Chrome is NOT my default browser.

I did some searching without finding anything I understood well enough to implement.

I would appreciate any help with this issue as having multiple instances of the app running is driving my octogenarian brain nuts.

My Bookmarks do not not show when I open Firefox. I have enabled Bookmarks under View > Sidebars but they don't show and I have to manually make the visible every time I us Firefox.

Typically, I have about 6 windows open at a time with about 20 tabs in each window. Previously, I was able to shut down my computer and all of them would reopen again. But, today is the second day in a row that that hasn't worked even though I have Open Previous Tabs & Windows checked off in the settings.

I would appreciate figuring this out as it's a pain in the ass opening everything again.

• I just noticed that Firefox is supposed to open automatically. This doesn't happen either.

I'm using a LG laptop running Windows 11.

After the last couple of Firefox updates, my settings have been automatically changed. This has not happened until recently How can I stop Firefox from changing my settings when it updates? OS is Windows 11. TYIA!

When I am trying to upload a file to any website in Firefox the right click context menu options are all missing. I have tried a new profile, troubleshoot mode, seems like nothing fixes it. Other browsers work like intended so I know it is Firefox internal

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!!!

Since update to Firefox version 138.0.1, my last viewed side bar is never automatically displayed upon REOPENING Firefox. I must always > View > Re-select the desired sidebar choice >

How can I get this side bar to re-display automatically upon opening Firefox as it used to in previous versions?

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)