I want to select text to copy on webpages using just the keyboard but all the shortcuts I found online are not working. What's the real shortcut for this task?
You can use F7 to get into caret browsing. Use F6 to select between the address bar and the page display. Then you can use a combination of PgUp, PgDn, Tab, and the arrow keys <^v> to move around. Hold down Shift while using the arrow keys to select a block of text and the standard Ctrl+C to copy. Ctrl+A will select everything on the page including images, ads, flash, etc. so be careful with that.