Firefox Community Forum

Since your last update on 13th Feb 2026, we have not been able to receive any emails on the computer. All phones and iPads do ! We keep seeing "Captcha " requesting us to match items, etc., then when we do and get them all right, it pops up a message "Oops, Something went wrong." Our Wi-Fi provider, Spark.co.nz, suggested that Firefox has something like a firewall stopping the emails from coming through. Your thoughts or comments would be appreciated. We have used other "Browsers" which allow them to do so, but would rather have Mozilla Firefox, which gives us no problem whatsoever with all other Apps and Websites.

Kind Regards.

Ray (Retired Engineer)

Hi everyone,

I’ve been experiencing performance issues while using Mozilla Firefox, especially when working with browser-based tools that handle file processing.

When I try to upload or process larger files (like PDFs), I notice the following:

• Firefox becomes slow or laggy • The tab sometimes freezes temporarily • File processing either takes too long or doesn’t complete • Occasionally I get a “page unresponsive” message

For testing, I used an online tool: [ONLINE EDITOR]

The issue seems more noticeable with larger files or when multiple tabs are open.

What I’ve tried:

• Restarting Firefox • Clearing cache and cookies • Disabling extensions • Testing in Troubleshoot Mode • Updating Firefox to the latest version

The same tasks seem to work slightly better in other browsers, so I’m wondering if this is related to Firefox performance or settings.

Question:

Is there any way to improve Firefox performance for heavy browser-based tasks like file processing? Are there specific settings I should adjust?

Thanks in advance!

Hello all,

I've been a long time Firefox user and recently (starting about 2 months ago) started seeing some irritating behavior while browsing. Firefox will at random intervals "gray out" either while interacting with specific webpage elements, or browsing specific websites. An example of this "gray out" condition is included as a screenshot. The browser will flicker between this "gray out" condition and the webpage, occasionally staying in the "gray out" state for 3-6 seconds. As you can see in the screenshot all Firefox UI elements are also missing, so this seems to be broader application issue. I've noticed this particular issue repeatedly on Amazon.com while moused over product photos.

I consider myself a power user. As for my PC, it is running Windows 10. All graphics drivers are up to date. Other apps run normally. I've never had any problem browsing/interacting with similar web content in Microsoft Edge... but I heavily prefer to use FireFox. Has anyone else encountered an issue like this?

So, today I found that absolutely all of my tab groups have been wiped from existence. Not passwords, bookmarks, history, extensions or anything of the sort. Just tab groups specifically. Everything else in my profile is still here. I tried restoring from a backup using the Session History Scrounger at https://www.jeffersonscher.com/ffu/scrounger.html but my closest backup was a March 26th one that is missing an entire tab group created after that date.

I tried searching other solutions to my issue, but nothing has worked so far. It doesn't have anything to do with updates as the last one happened on March 26th and I definitely used the tab groups after that point. I'm at a complete loss on what I am supposed to do, as I lost ~600 tabs combined across all groups

Hi everyone 👋

I recently noticed that my website minecrftgeek sometimes loads differently in Firefox compared to other browsers. Has anyone faced similar compatibility issues, and what steps should I check to make sure my site works smoothly in Firefox?

Thanks for your help! 🙂

My friend and I usually use the same account on Firefox and he dismissed the pop up for the new VPN a few times, according to him. Every page I can find about setting up the VPN involves this pop up, and I cannot find another way to activate this.

I tried to log out of my friend's Firefox account and into mine, but the pop up did not appear for me. Is there another way I can set that up?

How can i change a icon on my desk top it was change to a firefox icon. Pogo is the site I use to play other games now it has a firefox icon the site is pogo. Could you please provide me with infomation so I can tried to change it back to a pogo icon.

I've just upgraded to V149 and, when using NordVPN, Firefox is now taking at least 30secs to startup. If NordVPN is off startup is instant. Prior to V149, Firefox startup was instant, both with and without NordVPN.

some special characters that i distinctly remember being able to see before are now no longer showing up properly. i'm a fanatic about ancient/prehistoric scripts and was able to see the scripts on the Baybayin Wikipedia page, but i think a few updates ago made this no longer true.

i'm able to see things on other browsers and even in the right-click menu as i have the font needed to see everything installed onto my system (win 10, i dont have security updates enabled. the font is noto sans tagalog, and i've already reinstalled it twice). the setting to allow pages to use their own fonts doesn't seem to do anything, either.

confusingly this is not a problem on my macOS device, where the same page renders correctly without me needing to download any font (i mean, as far as i remember). i think this implies this has something to do with windows, but i'd like to ask in here first.

attached is a screenshot of the wikipedia page showing in firefox on windows 10, and the right-click window displaying the script correctly.

Secure Connection Failed

An error occurred during a connection to hub.localwp.com. The OCSP response is not yet valid (contains a date in the future).

Error code: SEC_ERROR_OCSP_FUTURE_RESPONSE

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

All firefox windows just disappear after a random amount of time. Where can I look for possible logs of what's happening. Didn't see anything obvious in Event Viewer>

I can't do a review or get in contact with the developer of "Watchmarker for Youtube. I can read 145 reviews, but I can't actually write one.

https://addons.mozilla.org/en-US/firefox/addon/watchmarker-for-youtube/reviews/

I don't understand a lot of the UX decisions behind the new search bar: - Requires more clicks and keyboard strokes now to do the same things - Trending search suggestions cannot be disabled - But after disabling search suggestions entirely (because I don't want to see trending suggestions), I still see recents suggested when I first select the search field... but only then, and not as I type? - Hitting backspace one too many times reverts the search bar to my default search engine

The old search bar was awkward, but this one feels worse. Waaay overdesigned. Is there anything I can do about any of these issues? Should I expect any updates to search bar functionality in the near future?

Bonus complaint: WTF is up with the numbered list/bullet list situation on this form, holy moly. Had to just use dashes because those features are so unusable.

When I try to log into twitter (X) I get a pop up saying I'm blocked due to suspicious log in activity, that I have tried to log in too many times. I had not tried to log in for days. I do not get this message and can log into X on other platforms, including chrome and Edge. I prefer to use Firefox. This started happening after I uploaded the newest Firefox upgrade on 3/3/26, I run windows 10.