how do I make only one tab open when Mozilla browser opens
Every time I open the Mozilla FF browser the following tabs appear: Mozilla Welcome, the Default Mozilla screen, AVG Secure Search and Coupon Bar. I also get a prompt to enter my Pocket username and Password. Before I updated FF, I would not get all those tabs upon start up and I would already be logged into Pocket. I haven't changed anything in my settings, so I don't know why it's like this all of a sudden.
If you are seeing tabs or popups that you don't recognize, then it is likely that one of the addons or plugins has been updated or there has been some software installed on your machine which is causing this. To confirm this, kindly check if you are seeing the three tabs open when you open Firefox in safe mode (instructions below)
Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
(If you're not using it, switch to the Default theme.)
On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.
Once you get the pop-up, just select "'Start in Safe Mode"