JS Injector Firefox

JS Injector

By: Joey
Automate testing and auto-populate forms by injecting javascript code into the page. If [Run in isolation] is checked, the injected script will not contaminate the original code.

Features & Capabilities

JS Injector Chrome Extension

JS Injector enables automation of web testing and form filling by injecting custom JavaScript directly into web pages. You can add popular libraries like jQuery, specify target pages using URL matching including fuzzy patterns, and choose to run scripts in isolation to avoid altering original page code or allow interaction when needed.

Its core features include seamless integration of existing JS libraries, precise targeting of web pages for script injection, and flexible isolation modes to protect or interact with native page scripts. This extension is ideal for developers aiming to streamline their testing workflows and auto-populate forms efficiently without modifying original site code.

User Growth & Download Statistics

Manifest V2 Add-on Developer Tools Programming
By:
Joey
Daily users:
151 -1
Rating:
3.40
(5)
Version:
0.0.2 Last updated: 2021-09-24
Version code:
5300196
Creation date:
2021-09-09
Risk:
High risk impact Low risk likelihood
Permissions:
Content scripts matches:
  • <all_urls>
Size:
1.89MB
Email:
zh*****@126.com
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-14
Compare stats and ranking:

Other platforms

Chrome
JS Injector (v0.0.2)
18 5.00 (3)

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Joey
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/js-injector/
Email:
zh*****@126.com

User Reviews

Work perfectly as attended
by Di*****, 2026-02-08

by 全民*****, 2025-03-27

by 远离*****, 2025-02-17
View all user reviews ›

Is JS Injector Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

JS Injector requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

JS Injector has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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