Also, when i open firefox sometimes, the toolbar changes?

I set my toolbar up there ^ so that i always have the new window and new tab option there for me to click on, seeing as how i often play games, i will open up guides and such in a different tab.
But every now and again, it clears that, and all thats up there is back/forward button, Refresh button, Home button, and obviously all the options and stuff above it. So can anyone tell me why firefox keeps making the new tab button disappear, so i have to put it on manually...

Hello,

Do you mean the + sign beside the tab? What version of Firefox are you using?

the latest version i believe, it is supposed to auto update, and i always let it update, so i must have new version.
Its the open new tab icon, normally used in conjunction with the open new window icon. Its next to the URL bar, and beneath the: 'File Edit View History Bookmarks Tools Help' bit

Hello,

I'm not sure what you can do about that. There's another new tab button located to the right of each tab, you can use that instead.