Nexus 7 do not have the menu button!
Go to Solution.
The menu is in the upper right (next to the tab) on Nexus 7. So any instruction uses that instead and has no 'More' button.
Hope this helps,
Press the three dot button in the upper right of Firefox. Same as Chrome, G+ and similar programs.
Someone has the same problem on Verizon Galaxy S3 I535.
The Galaxy S 3 has a hardware menu button on the lower left. Sadly Samsung disables the button glow after a few seconds so you can forget they are there.