How to Open More Than One Web Page at a Time on a Mac
When the majority of Web users accessed the Internet through slow, dial-up connections, browsing all Web pages from a single window was not uncommon. Rather than load four or five pages very slowly, users often opted to focus on loading one page more quickly. With broadband access now commonplace, opening and actively using multiple browser windows is the norm. All Mac browsers allow users to open multiple windows, and nearly all current browsers support the opening of multiple tabs within a single window.
Open your Web browser.
Click "File" in the top menu bar.
Select either "New Window" or "New Tab" from the resulting drop-down menu. The New Window command opens an entirely new browser window, exactly like the one you launched in Step 1. The New Tab command uses only one browser window, but opens a new viewing pane accessed through a tab near the top of the browser window.
Click the address bar of the new window or tab you created in the previous step. Enter the URL of the Web page you want to view and press the "Enter" key to begin browsing. Depending on your browser's settings, the window or tab may automatically open your home page, or a list of recently-browsed pages, instead of a blank page.