Firefox Community Forum

Hello,

I just moved from Windows 10 to Linux Fedora Workstation and I used the "Back up and restore" option in the Sync Tab available in Firefox on Windows 10 to save my data in the form of a unique html file. (https://support.mozilla.org/en-US/kb/firefox-backup)

But now that I'm in Firefox on Fedora, this option does not seem to be available (in the Sync tab in Settings). Is there any way I could at least recover my bookmarks ?

I'm using Firefox 147.0.1 from the official Federa repo.

Thank you for your help.

I run Ubuntu Mate. But versions later than 20.04 of Ubuntu Mate do not provide color support for my Samsung CLP-620. And, I can't install your latest MozillaVPN version on 20.04 because it requires libssl.3 (I think that's the designation) which is no longer available for 20.04. So, I am left with the choice of (1) no MozillaVPN but a color printer; or (2) no color printer but MozillaVPN. I have multiple computers so if you can't tell me a way to get both (MozillaVPN and 20.04), I'm stuck with a conundrum and will end up dedicating one expressly for printing when I need color -- what a waste!

Note: I know 20.04 is history but I can live with it if I have to rather than junk a good printer.

I hope you can help.

All the best. Thanks for all you do.

Your computer thinks it is May 1, 2026, which prevents Firefox from connecting securely. To visit www.olx.com.br, update your computer clock in your system settings to the current date, time, and time zone, and then refresh www.olx.com.br.

Resolved Update: apparently cat cannot write to /etc. Resolved by using:

sudo tee /etc/apt/sources.list.d/mozilla.sources <<eof types: deb uris: https: packages.mozilla.org apt suites: mozilla components: main signed-by: etc keyrings packages.mozilla.org.asc eof p></eof>

The instructions need updating!

_________________original problem (in case some one else needs the information)

I am following the instructions in section "Install Firefox from Mozilla Repository (Recommended)" at https://support.mozilla.org/en-US/kb/run-firefox-chromeos At step 4 I am receiving a permission denied error: "-bash: /etc/apt/sources.list.d/mozilla.sources: Permission denied" I am not sure how to resolve or continue.

Last command and output:

username@penguin:~ cat <<EOF > /etc/apt/sources.list.d/mozilla.sources Types: deb URIs: https://packages.mozilla.org/apt Suites: mozilla Components: main Signed-By: /etc/apt/keyrings/packages.mozilla.org.asc EOF -bash: /etc/apt/sources.list.d/mozilla.sources: Permission denied

• • Background:**

I'm a senior software engineer running Firefox Developer Edition on a Linux machine with 8GB RAM. I have Fission architecture (site isolation) enabled, which I understand is now the default since Firefox 95+.

• • The problem:**

When I open 20 or more tabs across different domains, Firefox's memory consumption scales dramatically — often reaching 4–6GB of RAM for what should be lightweight browsing sessions. This is significantly higher than what I observed before Fission was enabled.

• • What I've already tried:**

- Disabled hardware acceleration → no significant improvement - Set browser.tabs.unloadOnLowMemory to true → partial relief

 but tabs reload constantly, disrupting workflow

- Reduced content.notify.interval → marginal improvement - Tested with all extensions disabled (safe mode) → RAM usage

 still high, confirming it's not extension-related

- Checked about:memory → large number of separate

 "Web Content" processes, one per origin as expected with Fission

• • What I'm trying to understand:**

1. Is there a way to set a maximum process count cap for Fission

  without fully disabling site isolation? I found 
  dom.ipc.processCount but changing it doesn't seem to affect 
  Fission's per-origin process spawning behavior.

2. Is browser.tabs.min-warm-process-count a relevant setting here

  and what is the safe range to modify it?

3. Does Firefox have a built-in memory pressure threshold where

  it automatically consolidates processes — similar to Chrome's 
  memory saver — and if so, which about:config keys control it?

• • Environment:**

- Firefox Developer Edition 151.0b10 - OS: Ubuntu 24.04 LTS - RAM: 8GB - Fission enabled: confirmed via about:support - Extensions: disabled for testing

Able to sign in to Mozilla account, but cannot find Sync anywhere. Sync is OK on multiple other devices. System also seems unable to load 140.10 esr. Is it possible to sync on esr versions?

I'm trying to import my bookmarks from an HTML file. They say to click the menu button but there is NO menu button with 3 horizontal stripes. I'm using a Chromebook laptop.

Mozilla repeatedly fails to connect to the server at https://hqpaperround.net/ which I need daily. It connects to any other website I request. I am using an old laptop after my shop desktop broke down. It has never connected to that site. Can you suggest why?

at present it is 32bit Llnux Firefox ChaletOS. It appears it wants 64bit Linux but every time it only allows me access to 32bit version which tells me is out of date. What is happening?

While playing chess at lichess.org, browser power management inhibit messaging to the system gets stuck on its current status. That is, if power management is inhibited by media playing on another tab while I play a game, it will get stuck in the inhibited state. If power management is uninhibited while I play (no media playing), it will get stuck in the uninhibited state. This persists until the browser is restarted even if all tabs are closed.

I don't believe it to be a system issue, as the problem clears as soon as the browser is closed. Chrome based browsers do not exhibit the behavior for me, but I tried a Firefox fork (LibreWolf) and it has the same issue. I don't experience this issue at any other website I visit.

Only certain areas of lichess.org cause this behavior, primarily playing a game against a human opponent. I tried progressively blocking media and script requests to narrow down offenders, but I always break site functionality before I can pinpoint anything.

I'm not so much looking for a solution (although that would be great) as I am troubleshooting advice. Is there any way to narrow down exactly what it is about this specific website that is causing the issue?