hello walkerpbus, could you explain in more detail how you experiencing the slowness? (are pages loading slowly, does the whole application hang, in which situations; is there extraordinarily high use of memory or cpu resources, etc)

you can try to replicate this behaviour when you launch firefox in safe mode once, since you have quite a few addons present. maybe one of them is interfering... another thing to try is resetting all network related preferences - enter about:config into the firefox location bar (confirm the info message in case it shows up) & search for all custom preferences (=shown in bold) that begin with network.dns or network.http - right-click and reset those entries to their default values, since they might have negative effects for page loading times.

more troubleshooting guidance is available at Quick fixes if your Firefox slows down

Also, make sure to update to Firefox 18.

It may have been due to one of the tabs, because it seems to be working now & my reply is now on V 18.0 Firefox.

It's back to not working. I don't know why. I'm entering this on my home machine,,

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See:

• https://support.mozilla.org/kb/Server+not+found
• https://support.mozilla.org/kb/Firewalls

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.