Diễn đàn hỗ trợ Firefox

I'm looking for a reliable method to sync my Firefox bookmarks, browsing history, and settings across multiple devices while ensuring the security of my data. I want to make sure that my sensitive information remains protected throughout the syncing process. Can anyone recommend a secure solution or provide guidance on the best practices for setting up Firefox sync? Additionally, I'm interested in learning about any potential privacy considerations I should be aware of when using this feature. Any advice or recommendations would be greatly appreciated. Thank you

GOOGLE WILL NOT LET ME SIGN IN ON FIREFOX. I can sign in will all other browsers but I get this message on Firefox:

Couldn’t sign you in This browser or app may not be secure.

I have cleared cache, cookies. Checked for updates...rebooted, ect. Nothing works.

HELP!!!!

I try to disable the transition to fullscreen by following the steps. But after restart the Firefox ESR (waterfox), the rule don't apply. The rule:

/* Minimize fullscreen transition time */
#navigator-toolbox[fullscreenShouldAnimate] {
    transition: 0ms !important;
}

toolkit.legacyUserProfileCustomizations.stylesheets

Hi Team,

Good Day!

This is to let you know Firefox Browser not working after uninstalling and installing a new one.

Mohammed Muzammil Mobile/WhatsApp: [removed phone# from public]

Hello. I just wanted to add 8-10px border-radius and a thin 1px border. Just like all chromium browsers already have and even Waterfox did it too. I tried to do different things already, but I couldn't find the way how to get rid of that background with square corners. See the attached image to better understand what I mean. My attempt on the left, and Chrome on the right. These square corners (green in this case) behind. Any ideas? Thanks in advance for any answer.

So I have been some issues with my Debian bookworm (Gnome bugged out) and changed to Sparky ( not a massive update I know, it's the same repo anyway) . Once Sparky Firefox upgraded to the latest version, I noticed some interesting behavior (tor running in the background and etc). I wasn't careful with playing gods with storage & cache, so had to again reinstall sparky. To my surprise my all passwords, bookmarks. add-ons are gone. I had just one account (was also using the dev browser for some time), so really it's awkward ad upsetting situation, any troubleshooting steps you can suggest?