Web Browsing Tricks
Jump to address bar, There are a number of ways to jump right to the address bar from anywhere in browser. Pressing Ctrl + L, F6, and Alt + D all accomplish this goal.
Automatically add www. and .com to a URL, You can shave off a couple of seconds typing in a URL by simply click Ctrl + Enter after you type the name of the site. Need .net instead of .com? Press Ctrl + Shift + Enter instead.
Cycle through open tabs Pressing Ctrl + Tab while in a browser will flip between each one (Ctrl + Shift + Tab to go backwards). This can be much faster than moving the mouse and clicking on a tab. Ctrl + Num (1, 2, 3, 4, n..) will also take you to certain tab in that numeric order. Ctrl + 9 always brings you to the very last tab, even if it's beyond the ninth one.
Scroll through pages with the spacebar Tapping the spacebar on a website will scroll down in full page chunks and hitting shift + space will take you back up.
Instant image search (Chrome only) If you hold down the "S" key and right click on an image, it will open an image search on a new tab.
Use private browsing The uses for not having cookies and history saved are obvious for certain activities, you know, like shopping for gifts on a shared computer (of course!). Pressing Ctrl + Shift + N will launch a new private in Chrome, Ctrl + Shift + P will do it in Firefox and Internet Explorer.
Convert your browser into a notepad Type this into the address bar and you can write notes. Alternatively, while not as fast. Use Google Keep or Gmail's compose mail to write notes and have those saved on the cloud as you type and go.
Icon-only bookmarks on your toolbar You can delete the name of your bookmarks leaving only the icon so they take up less space on the toolbar. In Chrome: right click the bookmark > edit > delete the name and save.
Use the scroll wheel Put your middle mouse button to use by clicking on links to automatically open them in a new tab/window. Also if you use the scroll wheel button on a tab, it will close it.
Copy links quicker Right click the link like usual but tap E on your keyboard to copy the link.
Make content editable Bring up the console on Chrome or Firefox (right click, Inspect). On the console enter the command document.designMode = "on" that will let you edit any text on the screen.
Zoom In, Reset Zoom Use the browser magnifier to adjust a website for more comfortable reading. Ctrl/Cmd + (plus/minus sign) does the trick. To reset to the default zoom level use Ctrl + 0.