I have been experiencing a lot of lagging, lockups and closure when browsing. I use Windows Version 10.0.26100 Build 26100. My Firefox version is 138.0.3 (64-bit). While telling you about this issue, my systems has locked up. I had to wait for it to start again. I have had to use other browsers, Google Chrome and Edge to complete tasks. I am able to browse and do everything fluidly, without issue using those browsers. I have noticed that certain website just do not work well with Firefox. I'm wondering why that is? For instance, Petsmart.Com. That's a popular website. I almost always have to complete my orders using a different browser. Is there anything that I can do about this? I'm really frustrated and getting ready to ditch Firefox. Thanks for any help you can provide. Melanie