How do I enable Javascript?

Good news — JavaScript is already enabled by default in Firefox for Android, and there's no on/off switch for it in the app's Settings. If a website keeps telling you that JavaScript is disabled, try these checks: 1. In the address bar, type about:config and search for javascript.enabled — make sure its value is true. If it's set to false, tap the toggle button next to it to turn it back on. 2. Check whether an add-on is blocking scripts. Open the menu (⋮) → Add-ons and temporarily disable anything script-related (like a script blocker), then reload the page. 3. Tap the shield icon in the address bar and review the Enhanced Tracking Protection setting for that site — Strict protection can occasionally interfere with how a page loads. If the problem only happens on one particular site, it's likely something on the site's end rather than your browser settings.