In other words:
- how to turn off JavaScript using browser DevTools
- how to use DevTools to disable JS in Chrome and Firefox
Maybe you’re trying to troubleshoot a site, reduce distractions, improve privacy, or just see how pages behave without scripts enabled.
In online discussions, such as those on Reddit users have noted that this can occasionally change how websites behave, including removing ads or altering access to content behind logins or paywalls.
For a more ethical approach, here are some legitimate ways to access premium content without violating publisher terms.
Whatever your reason, DevTools offers a quick, temporary way to disable JavaScript.
Here’s how to do it in both Chrome and Firefox browsers.
How to Disable JavaScript using DevTools
Disabling JavaScript is a great way to test pages without scripts or bypass mild annoyances, but remember, it’s only temporary and browser-specific.
Firefox: Method 1 – Using the Settings Menu
- Open Firefox and press F12 to launch DevTools.
- Click the ⋯ (three-dot) menu inside DevTools, then choose Settings.
- Scroll down to the Advanced Settings section and check Disable JavaScript.
- Close DevTools and reload the page to see how it behaves — no scripts will execute now.
This method disables JS in that tab and session only, making it ideal for quick tests without affecting other browsing.
Firefox: Method 2 – Debugger Settings
- Press F12 → navigate to the Debugger tab.
- Click the cogwheel (settings) icon in the Debugger pane.
- Enable Disable JavaScript to turn it off immediately.
Same as above — it lasts only while DevTools stays open in that session.
Chrome: Method 1 – Run Command
- Open Chrome and press F12 to access DevTools.
- Select the ⋯ (Menu) → Run Command, or press Ctrl + Shift + P.
- Type “:JavaScript” → choose Disable JavaScript from the prompt.
- You’ll notice a JS-off icon in the DevTools toolbar and address bar, meaning the JavaScript is now off.
This method is convenient and can be toggled quickly on and off.
Chrome: Method 2 – Settings Menu
- With DevTools open, click the gear icon.
- Scroll to the Debugger section and check Disable JavaScript.
- Close the settings pane. JavaScript stays disabled until you uncheck it.
What Happens When JavaScript is Disabled?
- Scripts won’t run, so parts of the site may not function properly (e.g. forms, menus).
- Some dynamic content like lazy-loaded images or pop-ups may not appear.
Use this method for testing or simple tasks like reading content without distractions, but if something breaks, that's why.
Alternatives to Disabling JavaScript Entirely
If you just want to block ads, trackers, or intrusive scripts without turning everything off, you can also use tools like uBlock Origin, Web Developer, or JavaScript Disable Chrome.
They let you selectively block scripts and fine-tune your browsing experience without affecting core functionality.
Disabling JavaScript FAQ
Q1: Will disabling JS break websites?
Yes, many interactive features may stop working, including login forms and dynamic content.
Q2: Is this permanent for all pages?
No, it only applies to the current tab/session in DevTools.
Q3: How do I re-enable JavaScript?
Reopen DevTools and uncheck “Disable JavaScript” (or run the “Enable JavaScript” command) to restore normal behavior.
Q4: Are there safer alternatives?
Yes, use script-blocking extension like uBlock Origin, which offers more control without a full disable.
Conclusion: Disable JavaScript with DevTools
Disabling JavaScript through DevTools gives you a fast, temporary way to view sites script-free, to fix bugs, reduce distractions, or troubleshoot behavior.
Try the methods for both Chrome and Firefox, and remember: once you're done, simply uncheck the option to bring JavaScript back.