I-Firefox Community Forum

whenever i scroll trough a website in firefox, the ewperience is very laggy, feels like its 15fps. i have done basic things like disabling hardware acceleration, smooth smooth scrolling.

I installed Firefox on my new computer. It imported setting from Chrome. That's not what I wanted at all. Now, I can't get rid of that information that was imported because it synced. How do I get rid of this data permanently? I have Firefox on my old computer but I don't want to connect online for fear it will sync and contaminate my other Firefox installations. How do I clean out my online profile?

Hello,

Since Firefox v142, the website I develop has been having trouble with the Firefox browser. It works fine most of the time, but occasionally Firefox will not send all of the cookies that are set for the domain. This is causing users to appear unauthenticated, and is causing errors because critical information isn't being set.

I wanted to see if this is something that was a setting that could be resolved before I reported it as a bug.

Is anyone else experiencing this?

Thanks.

Hi!

Please see attached image:

Left: Edge (making sure it isn't a network issue)

Right: Firefox using a new profile from about:profiles.

On my main profile, I've tried clearing the data and cookies (though not the history) a couple of weeks back.

Any suggestions welcomed! Many thanks in advance.

My shortcuts no longer appear on my homepage. This just started happening. Shortcuts are still enabled in my settings. I refreshed Firefox. The shortcuts reappeared for a while, then disappeared again when I closed/reopened Firefox. I am on Windows 11 O/S

Firefox freezes when I try to sign into YouTube via Google. Becomes totally unresponsive and I have to close browser. It's the only site this happens on. I have cleared the cache and cookies, unchecked "Hardware Acceleration" and other recommendations from other posts. Please talk to me like I'm your Baby Boomer dad.

Hello- When I am on a website and click link I would expect and want a new Tab to open-- I want it to open it in a new Tab and leave the page I'm on alone so I can go back to the original page.

Instead, Firefox overwrites that page and the tab with the a new one, and I have to hit the back button to get back to that original page. And most often the back arrow button is grayed out and I can't get back at all.

In settings, I've tried checking the box for: 'Open links in tabs instead of new windows' but that doesn't do it. I've also tried checking the box, 'When you open a link in a new tab, switch to it immediately,' and that doesn't do it either.

I know that a work-around is to hold down the Ctrl key while clicking a link, but I'd like to set it as a default so I don't have to do that. That's a pain and not a natural function when browsing. To be sure, I want to click on links and that creates a new Tab without Ctrl Keys.

Thanks!

Hi all, I remember in older versions of Firefox (within the past 6 months) that pdfs embedded in a page would be a hyperlink that you had to click which would open in another tab. Now pdfs automatically open which is very annoying as it makes it difficult to read, while I found a way to open it in another tab I was wondering if there is a setting I can disable so I can just click on a hyperlink.

Thanks in advance

Hi everyone,

After enabling `privacy.resistFingerprinting = true` in `about:config`, I noticed that Firefox’s built-in PDF viewer (`pdf.js`) is always displayed in **light mode**, even though my system and browser themes are both dark.

I understand that RFP forces `prefers-color-scheme: light` to prevent fingerprinting, but this also affects internal components like the PDF reader. Unfortunately, the PDF viewer doesn’t provide a manual dark mode toggle.

Is there any **official or safe workaround** that allows keeping RFP enabled while still having the PDF viewer use dark colors?

Thanks!

This started happening a few days ago.

I tried to drag a tab out of the main window to put it in its own window on my other monitor, but the tab just became unselectable, and if i scrolled in the tab bar, the tab icon and text would remain locked in place in the display while the other tabs moved behind it.

The main Firefox window also lost the minimize, restore, and close buttons. The only way to make the tabs work was to close Firefox and relaunch it.

I noticed this happened only after any app in the OS went full screen, be it a steam game, or another Firefox window, or a VLC window, or anything else that I did that made an app full screen in any of my monitors.

I am using Ubuntu 24.04 with KDE Plasma 5.27.12. Kernel is 6.14.0-29. Display server is Wayland.

Initially I thought this could be a problem with the snap version of Firefox, so now I've installed the deb package, but the problem remains. Firefox is the only app which presents a problem of any kind when any window goes full screen.

Here's a video showing what the problem looks like, in case my description was not clear. The ghostly tab in this video is the chess.com home page and you can see it as the third tab from the top right of the video, and it remains in that position as i scroll the other tabs, completely unselectable with the mouse.

https://www.youtube.com/watch?v=-mAfPS3_qkg

Any idea of what could be causing this issue to appear?

Thank you!

Hello Firefox Support Team,

I would like to report a browser compatibility issue regarding CSS positioning behavior that differs from Chromium-based browsers.

• • Issue Description:**

When an element with `position: sticky` is placed inside a container with `position: fixed`, Firefox treats the sticky element as if it has `position: relative`, effectively breaking the sticky positioning functionality.

• • Expected Behavior:**

The sticky element should maintain its sticky positioning behavior even when nested inside a fixed-positioned container, as it does in Chromium-based browsers.

• • Current Firefox Behavior:**

The sticky element loses its sticky properties and behaves like a relatively positioned element.

• • Use Case:**

This issue particularly affects modal implementations where: - The `body` element receives `position: fixed` to prevent background scrolling - Page elements (such as `.total-section`) should maintain their sticky behavior regardless of changes to the body positioning

• • Browser Comparison:**

- **Chromium browsers (Chrome):** Sticky positioning works correctly in this scenario - **Firefox:** Sticky positioning fails and falls back to relative behavior

• • Request:**

Could you please consider aligning Firefox's behavior with other major browsers? The current inconsistency creates cross-browser compatibility issues and forces developers to implement JavaScript workarounds.

Thanks!