Who is JS Injector for?

JS Injector is a B2B product built for web developers and QA testers.

Does JS Injector have a free plan?

Yes — JS Injector is free to use.

What platforms does JS Injector run on?

JS Injector runs on the web and embeddable surfaces.

Is JS Injector still active?

Unverified. JS Injector has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to JS Injector?

Similar projects tracked by PulseGate include JS Injector download, Simple JavaScript Injector, and Code Injectorvvbn.

Who develops JS Injector?

JS Injector is developed by Joey.

When did JS Injector launch?

JS Injector first shipped in 2021.

Back to the index

JS Injector

Name: JS Injector
Author: Joey

mozilla.orgBrowser DevTools & extensions

JS Injector is a Firefox extension that injects JavaScript into specified web pages for testing and form population. It supports adding JavaScript libraries, fuzzy URL matching, and isolated or page-context script execution for web developers and QA testers.

FreeWebEmbeddable

Visit mozilla.org

1alternative

6features

2021since

Overview

6 features

JS Injector sits in PulseGate's Browser DevTools & extensions category. It focuses on injecting and testing JavaScript on target web pages without manually editing page code. JS Injector is a B2B product aimed at web developers and QA testers. JS Injector is free to use. JS Injector is available on the web and embeddable surfaces.

Joey builds and maintains JS Injector, and it first shipped in 2021. Key capabilities include script injection, form population, and javaScript libraries. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Script injection
Form population
JavaScript libraries
URL matching
Isolated execution
Page-context execution

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed11 Sep · 13:39 UTC
JS Injector verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about JS Injector

What does JS Injector do?: JS Injector focuses on injecting and testing JavaScript on target web pages without manually editing page code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is JS Injector for?: JS Injector is a B2B product built for web developers and QA testers.
Does JS Injector have a free plan?: Yes — JS Injector is free to use.
What platforms does JS Injector run on?: JS Injector runs on the web and embeddable surfaces.
Is JS Injector still active?: Unverified. JS Injector has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to JS Injector?: Similar projects tracked by PulseGate include JS Injector download, Simple JavaScript Injector, and Code Injectorvvbn.JS Injector download Simple JavaScript Injector Code Injectorvvbn
Who develops JS Injector?: JS Injector is developed by Joey.
When did JS Injector launch?: JS Injector first shipped in 2021.

At a glance

Pricing: Free
Platforms: Web
First seen: 11 Sep 2026
Built for: web developers and QA testers
Model: B2B
Solves: Injecting and testing JavaScript on target web pages without manually editing page code.

Registered as

Firefox Add-ons: js-injector

Developer

Joey

Index record

Indexed: 11 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 11 Sep 2026

Identity audit (13)

Slug: js-injector-mozilla-org
Lifecycle state recorded: 11 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 11 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 11 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/js-injector

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