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Added [S] shortcut as it makes the tip much more useful

Keyboard shortcuts

s/Escape/Esc for consistency (before it was sometimes "Escape", sometimes "Esc"), Esc is better when it comes to shortcodes

Firefox Developer Tools

Link to ESLint instead of JSHint, because more popular+versatile, is used by default for devtools linting ( and also for addons checks (


Added really helpful tool as suggested on and

Use a source map

Add TypeScript since its source map is supported so people googling for "firefox developer tools typescript source maps" end up here