With Firefox 3, the “Go button” (circled in blue below) in the url bar is only available some of the time, depending on context.
I myself, prefer to have it there all the time. As Firefox is highly configurable, all I have to do is make a small addition to the userChrome.css file (located in C:\Users\[yourUserName]\AppData\Roaming\Mozilla\Firefox\Profiles\[profileNumber].default\chrome\). Just add:
#urlbar[pageproxystate="valid"] > #urlbar-icons > #go-button { visibility: visible !important; }
Note, if this is the first time you have configured these files, make a copy of the existing file userChrome-example.css and rename it userChrome.css.
Another little change I like in my configuration is to change the mouse cursor when it is hovering over a hyperlink which, when clicked, will open the target in a new browser window. This time, you need to make a change to userContent.css, which is in the same directory as userChrome.css. To do this, you just add the following:
/* Change cursor for links that open in new window */ :link[target="_blank"], :visited[target="_blank"], :link[target="_new"], :visited[target="_new"] { cursor: crosshair; }
Happy computerating!