Diễn đàn hỗ trợ Firefox

I would like to understand how DNS over HTTPS impacts browsing speed and privacy in Firefox.

Details: Hello everyone,

I am currently exploring Firefox privacy and network settings, especially DNS over HTTPS (DoH). I noticed that enabling this feature slightly changes website loading behavior on some networks.

I would like to ask:

Does DNS over HTTPS introduce additional latency? Are there performance differences between providers? Can corporate or public Wi-Fi networks interfere with DoH requests? Is there a recommended configuration for balancing privacy and performance?

I’m interested in both technical explanations and real-world experiences from Firefox users.

Thank you.

Здравствуйте! В настройках установлено "запоминать историю", чтобы появлялись подсказки в заполнении форм. Однако эта функция не работает, а она мне очень нужна, так как я часто заполняю формы одними и теми же данными и значениями. В чем может быть проблема?

video downloadhelper is not saving the videos to vdhelper folder any longer. how do I change the folder location for only the video downloadhelper. its going straight to download folder.

thank you for your assistance.

I know I'm probably not in the right platform to be requesting a feature, but I hope you can add support for this website because I can't do video calls on facebook through firefox and I have to use a different browser to do so. Please add this feature as soon as possible. Thanks!

Firefox crashed and now my shortcuts have gone and the bookmarks are not easily accessible. I tried importing from the desktop but they are now in a long list and not as they were (in the toolbar. I can't gt the "bookmark summary" showing in the toolbar area.

Hi whenever I use my Google account to sign into websites (Google, ebay, YouTube, & anyother sites,) Firefox will become unresponsive, the window containing the tab i was using becomes unresponsive, sort of. - I can't click any open Firefox Tabs, - the red 'Close' radio button is greyed-out, so I can't close any tabs or the window - right-click is unresponsive, so i can't close tabs that way, but Command-W closes the tabs normally, but the others are still unresponsive.

- i can open a new Firefox window (with &/or without Tabs,) which works normally.

- & unrelated, but earlier, Firefox was running really slowly, Youtube videos were slowed down, but audio was normal, and scrolling was slow.

Hi there,

I'm wondering if I am experiencing intended behavior or if I've stumbled upon a bug. I am sometimes downloading files in a staggered manner (i.e., waiting for files to finish downloading before I start the next file downloads). However, any file after the first in that session shows an inaccurate progress indicator in the toolbar which includes progress of the already completed downloads.

For example, if I download two files completely, then start the download of two new files and both sit at 0%, the progress bar for the downloads actually shows 50% completed (2 files at 100%, 2 files at 0% -> Average of 4 files at 50%). I can't imagine this is intended behavior, for I imagine users would like to know how their current downloads are progressing only. This behavior is only fixed when I clear previous downloads, which resets the list to only active downloads, or when I restart the browser and start a new session.

Is there a setting where I can make the indicator report only active downloads?

Any insight is welcomed, thank you.

I am getting the message "updates are disabled by the admin." I am the only one here so I don't know how that happened. I need to install Slack but need to update first. I followed the steps to edit registry but still can't update. Please advise.

Bruce Caress

May 7, 2026, 15:17 CST

Hello, I've been watching MSNOW at 4pm eastern and after about half an hour it crashes. I get a message to send a report and restore the tab. I restore the tab which works for maybe ten minutes and crashes again. I am using Windows 11 on a new computer. I'd appreciate some assistance. Thanks. Bruce Caress

Moderator note: This question has been edited to precise Firefox and OS version, based on the crash reports.

when I try to access any website I get the same error message

Secure Connection Failed

An error occurred during a connection to support.mozilla.org. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   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.

Recently (about a month) I have found I often have to login to my Firefox account in order to access saved passwords etc. Sometimes from one day to the next. It never used to do this. Can't find any setting like "trust this device" or similar to stay logged in.

I was trying to reset my password and was having difficulty and finally I was able to change. I also have been trying to delete VPN and have been unable to find how to accomplish it.

My Firefox 150.0.3 (64-bit) in Windows 11 on a Dell 9310 locks up when the XPS is put sleep and awakened after 5-minutes or so. No recent Extensions or Add-ons have been installed. I have yet to delete and reinstall Firefox, maybe that's the next stop. I just can't find the problem with my limited tools and experience. Thanks, and appreciate the help.

When I search for something it shows up in English, but some text under the result is French as shown in the picture. I use latest Firefox with Google search engine, and I have all settings in Google set to English, And same for Firefox settings

The Roboform extension does not work :-( This has been going on for 2-3 months now.... It keeps telling me the extension is installed (which it is) but not enabled (which it IS) Thank you

David Berry mygsd1@gmail.com

Since April 27th have been various situations where this msg occurs: Access Denied You don't have permission to access ht tp :// signin.ebay.com/logout/confirm?" on this server. Reference #18.17fc3117.1778464971.41591197 An error has occurred

Although the letters in the reference can be different.

1. Trying to open E-Bay with an icon presented in Firefox for E-Pay, or searching Google for 'E-Bay Login', in Firefox, Edge, and Chrome this msg occurs. 2. If I can sign on, when opening searchers from a folder the searches:

	A. Some searches have the words, and show items for sale, but the rest have the access denied msg where the search words should appear. 
Will send a pic when can sign on.

2. If E-Bay will open, sometimes all searches will load ALL with the search words visible in all tabs, but when click on a link for an item to sell, the access denied msg occurs. Sometimes a few searches will load with the name of the search in the tab, but other searches will load with the will load with the words access denied, and the mas when clicked. 3. Some website like Arkaim of some such issued this msg: Your IPv4 Address 104.187.9.142 received a bad risk score. 4. Left msg on Firefox about above, no response, left 2 msgs on E-Bay Technical Support, no response, Microsoft no help, Dell no help, AT & T sent new Gateway/Modem.

IP address changed, and IPv4 changed to  IPv6. Same problem.

At & T said the old router was slower than I paid for: Speed Test 210.6, 29.7 New router 475.5, 225.8. Google AI says clear cache: Clear Cache on Desktop (Chrome, Edge, Firefox) [1, 2, 3] 1. Open Menu: Press Ctrl + Shift + Delete (Windows) or Cmd + Shift + Delete (Mac). 2. Time Range: Select "All time" to clear everything. 3. Select Data: Check "Cookies and other site data" and "Cached images and files". 4. Clear: Click "Clear data" or "Clear Now". 5. Restart: Close and reopen the browser. [1, 2, 3, 4, 5] I saved the icon of Network & Internet, Internet Options to delete temporary files, history, cookies, saved passwords, and web info (same Thiong??????) Lastly Google AI recommended editing the DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1). Any danger in doing this?