Nothing built in natively. There is a Search and Replace plugin that might help if you want to change text in the input fields.
Alternatively if you want to search and replace in the HTML you could Right Click → Edit as HTML the <body> in the DevTools Elements Panel select all the text with Ctrl+a, paste into your favourite editor, make the change there and paste it back.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
