Simple JavaScript Injector

Simple JavaScript Injector

This addon creates a small popup that lets you paste some JS code and inject it into the page you are currently seeing.

What is Simple JavaScript Injector?

Simple JavaScript Injector is a Firefox add-on that creates a popup allowing users to paste and inject JS code into the page they are currently viewing.

Users: 202 ▼ -10
Rating: 3.00 (2)
Version: 1.1 (Last updated: 2022-12-26)
Creation date: 2021-06-23
Weekly download count: 15
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
  • activeTab
  • storage
  • tabs
  • http://*/
  • https://*/
Size: 71.45K
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Chrome-Stats extension

This is an adaptation to Firefox version of the Chrome extension "JS injector" from Daniel Han.

Original source code:

User reviews
Add the ENABLED mode by default. Rubbish. Once installed, all scripts on the sites are always turned off. There are a lot of clicks on sites. You have to include every page. You have to include a script for each site every time. You can't make it ENABLED by default. It's cruel. It looks beautiful and cool. But not functionally.
by Sergio, 2023-12-11
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Risk impact

Simple JavaScript Injector is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Simple JavaScript Injector if you trust the publisher.

Risk likelihood

Simple JavaScript Injector is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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