I have been having FF lose the connection and will not regain it unless I shut FF down and reboot it.
This just happened while I was reading Ramona's posting about the most recent security threats. I had brought up her post in a new tab but continued reading some other posts. Eventually I read Ramona's message - and when I clicked on the link that applied to my interests a new window popped up and the browser was attempting to load the page but never did load anything.
I then tried to connect to some of the previous sites I have bookmarked and none of them would load.
I didn't try IE this time, instead I just shut FF down and rebooted it - Voila!! - immediate connect and loading of the pages that I had been trying to load.
Don't know if it is FF related or if it is my dinosaur (spelling?) computer.
This is what shows up when I click on 'About Mozilla Firefox' in the 'Help' menu.
Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7
I hope this information will 'make something click' for someone better able than I to understand the significance. I know that the more we can discover about a problem - the more likely someone can solve it.
Here's hoping, Ed B
Edit: I connect to a local ISP via Hardware Firewall - Cable Modem - LAN
Ethernet card. All the LED indicators on my devices were showing a properly functioning system during the time I couldn't load the pages.