Addendum:

At first firefox was generating pr_connect_reset_error but now it just times out or stops responding altogether.

Can you go to this link and verify that your drivers are current.

https://pcsupport.lenovo.com/us/en/selectproduct?linkto=downloads&linkTrack=footer:Support_Downloads

Then go to this Intel site and also check.

https://www.intel.com/content/www/us/en/support/detect.html

For the pr_connect_reset_error, what security software are you running?

Also, what version of Firefox?

Can you go to this link and verify that your drivers are current. https://pcsupport.lenovo.com/us/en/selectproduct?linkto=downloads&linkTrack=footer:Support_Downloads Then go to this Intel site and also check. https://www.intel.com/content/www/us/en/support/detect.html For the pr_connect_reset_error, what security software are you running? Also, what version of Firefox?

Firefox 126.0.1

I do have some drivers out of date, but they pertain to Bluetooth, wifi, and a graphics driver for Intel, and a BIOS update for USB-C power for Lenovo. Everything else is up to date.

My security software is a Trellix ePO agent. This is a requirement from my company, along with whatever extensions they are pushing out to the endpoints.

Can you go to this link and verify that your drivers are current. https://pcsupport.lenovo.com/us/en/selectproduct?linkto=downloads&linkTrack=footer:Support_Downloads Then go to this Intel site and also check. https://www.intel.com/content/www/us/en/support/detect.html For the pr_connect_reset_error, what security software are you running? Also, what version of Firefox?

Firefox version 126.0.1

For intel the only drivers out of date are a bluetooth driver, a wifi driver, and a graphics driver.

For Lenovo the only thing they recommended was a BIOS driver for power over USB-C, which I will probably update when Lenovo pushes their next firmware update. I am pretty good when it comes to updating for Lenovo.

The only security software I am running is a Trellix ePO agent, along with whatever extensions are installed on the corporate ePO.

The security software is causing the pr_connect_reset_error.

The security software is causing the pr_connect_reset_error.

Why is it that the Trellix Agent is only causing the problem infrequently? Why has it occurred now (I have had this agent and this browser for two years now) and why does it go away on reboot but come back after putting the computer to sleep, but also only infrequently? (I put the computer to sleep last night and did not have to do a reboot this morning)

This cannot be at the network level as Chrome and Edge do not display this behavior.

Could it be my VPN? I have two VPNs right now as I am in the middle of a data migration. The issue suddenly popped up after not presenting itself for most of the day.

I was bouncing between both VPNs when it suddenly occurred.

When using just the browser without the VPN, does Firefox work?

When using just the browser without the VPN, does Firefox work?

I don't know for certain yet. The behavior is currently not present and the browser is working fine despite being on either VPN. I wasn't able to test this past week due to various events, but the last time it hopped up was when I was hopping between VPNs.

I am going to continue to test now that we have moved on to the new work week.

I can confirm that it is switching VPNs that causes the behavior.

Firefox was fine for the past few days since my last post. But today I had reason to swap from the new VPN (Palo alto) to the old one (fortigate) and as soon as I hopped over firefox began to become unresponsive. It was like a switch got flipped.

If I am on the fortigate and then swap to Palo alto global protect, it's fine. If I go in the reverse direction it becomes very very slow verging on unresponsive.