Windows

Use CTRL-F to Find text on a page

MAC

Use CMD-F to Find text on a page

Android / Chrome
Samsung / Internet

Tap MENU (3 vertical dots, top-right)

Tap 'Find in page' menu

iPhone / IOS 9 and later

Tap on the top of the screen to see the URL bar and sharing buttons

Tap on the Sharing button (box with arrow coming out the top)

Scroll through options to find 'Find on Page' (magnifying glass)

Tap 'Find on Page'

iPhone / IOS 7 and IOS 8

Tap the URL Bar

use the 'x' button to clear the URL

Type in your search text

Scroll down through the search results for 'On This Page'

Tap on the Find '.....' option