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I have a 2023 MacBook Pro and a Synology NAS. Fairly recently, when I have tried to access the web site for the NAS using Firefox, I have received the following error message: "Unable to connect. An error occurred during a connection to [the IP address].” I am able to access the web site using the Safari and Bing browsers, and I also am able to access the web site using Firefox on an iPad. I already have contacted Apple and Synology support personnel, and have been that the issue is not with either Apple or Synology products. Please let me of any potential solutions to this problem that Mozilla may have.

Hi, During some tests I found that FF 115.19.0esr can still execute arbitrary JS similarly to CVE-2024-4367. I’ve checked the versions and > 115.11esr should be patched. Any payload with ‘/JS’ taken from https://github.com/luigigubello/PayloadsAllThePDFs/tree/main will do. Since this is probably important – FontMatrix is *not* working (no JS), original PoC (https://codeanlabs.com/wp-content/uploads/2024/05/poc_generalized_CVE-2024-4367.pdf) is also *not* working. I also wasn’t able to call an external script and so far haven’t found any path to exploit it beyond an alertbox. However, it still bothers me a lot and I’d like to know whether it’s the correct, expected behavior with FF+pdf.js, is it a vulnerability, or maybe my browser was somehow corrupted or is using some other mechanism that’s not within your control (my settings? about:config?).

Steps to re-create: 1. Open file in notepad 2. Add ‘/OpenAction 99 0 R’ after ‘lang’ in ‘1 0 obj section’ 3. After ‘endobj’ add ‘99 0 obj <</Type /Action /S /JavaScript /JS (app.alert\(1\);)>>’ 4. Result – alertbox popping twice

Придется вам как-то перевести самостоятельно то что написала на английский. Зачем писать что при обновлении все будет сохранено, если после обновления, половина окон на восстановилась и история предыдущих посещений пропала.? и как мне теперь все это восстановить обратно?'

My software is old. Windows 7. I know it is not supported any longer. Just started having problems loading email. Getting messages saying my Browser is not supported. Have I missed updates for FireFox?

In previous versions of Firefox (up to version 133), it was possible to automatically trigger printing of a PDF file by loading it into an iframe from a sandboxed iframe and call print. However, starting with version 134, this no longer works.

Is there any other way to automatically trigger the print dialog for a PDF file in Firefox, similar to how it can be done in Chrome/Edge (e.g., by opening the PDF in a new window and directly triggering the print dialog without additional button clicks)?

Hi Win10 PC fully up to date. Changed my printer from a Xerox to an HP laser. In the control panel, set the HP as the default printer. MS Office prints on the HP without prompting. Firefox (134.0.2) always defaults to the Xerox. The HP is available in the drop down box. Restarting the PC or reloading Firefox makes no difference, Firefox always defaults to the (non existent) Xerox. MS Edge defaults to the HP. Any ideas? Regards - Andrew

Over the last few weeks, it feels like this browser is doing updates almost every day on my pc and laptop. After done updating i lose all my cookies, logging me out of all my accounts, dark modes and settings. This is my final attempt before swapping browsers.

Hi there, I just got a new work laptop and tried to sync my firefox browsers so I could keep my passwords and bookmarks from my old laptop. Unfortunately I forgot my password, so I had to reset it on my new device. I logged in again on my old laptop but it's still not syncing or updating the bookmarks on the new laptop. Is there any way to move my bookmarks and passwords over to my new laptop? Thanks!

I want to install a old version 52.3.0 X64 on my computer for developing web app. (the application is run on 52.3.0 X64). But I can not find the installation. Is there download center for the firefox old version?

I seem to have found a fake Firefox phishing website. The content of the website is in Chinese and it is included in Google search.

The fake websites are cn-firefox.com and www.firefsioix.com, I hope the community members can confirm the website information.

Hello to all,

I wanted to use DoH (dnsforge.de) under “maximum protection”, but with one exception: I would like Ecosia.org to be able to place ads for me, because I am convinced of Ecosia and want to support this project. Tested this with Cloudflare as well, setting up an exception here does not work either.

Now the exception set in Firefox has no effect. It should not be due to the DNS provider, because Ecosia.org is not blocked and has even been whitelisted.

What is the expected behavior of the “maximum protection” setting?

Kind regards