JS Injector

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.

Install Compare

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.

Add-on Developer Tools Productivity Programming

By:

Daily users:

Rating:

Version:

0.0.2 Last updated: 2021-09-24

Version code:

5300196

Creation date:

2021-09-09

Risk:

Permissions:

<all_urls>
tabs
storage
contextMenus

Size:

1.98M

Email:

zh*****@126.com

Full description:

Source:

Firefox Browser Add-ons

Updated:

13 hours ago

Ranking

Other rankings

#2 in inject keyword 8

#27 in jquery keyword 15

#72 in javascript keyword 45 ▲ 1

#161 in exist keyword 21 ▼ 4

#161 in script keyword 27 ▼ 2

Upgrade to see more rankings

Other platforms

JS Injector (v0.0.2)

35 5.00

(3)

User reviews

by 全民*****, 2025-03-27

by 远离*****, 2025-02-17

没有效果

by 独立*****, 2023-04-09

View all user reviews ›

Extension safety

Risk impact

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.
Critical ****** ****** ** ******* ***** ***** *** ** **** ** ***** **** ******** ****** *** ******** ********** * ******* ********
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

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

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** *** **** *******
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****

Upgrade to see full risk analysis details

Instantly check and monitor your browser extensions' risks and permissions with Extension Guard.

Compare add-ons

Similar add-ons

Here are some Firefox add-ons that are similar to JS Injector:

Francesco De Stefano

Javascript Injector

Simple JavaScript Injector

Custom JS Injector

Browser Injector

RKS-JS-Injector

Popular extensions / apps

Here are some popular extensions / apps that you might be interested in:

Pie Adblock - A Powerful Free Ad Blocker

https://pie.org

Idle Miner Tycoon: Gold & Cash

Booking.com: Hotels & Travel

Booking.com Hotels & Vacation Rentals

AdBlocker Ultimate

https://adblockultimate.net/

Microsoft Outlook

Microsoft Corporation

Capital One Shopping: Save Now

Keeper® Password Manager & Digital Vault

https://keepersecurity.com

Keywords Everywhere - Keyword Tool

https://keywordseverywhere.com/

AdGuard AdBlocker

Adguard Software Ltd

Shopee 6.6 Liquida Meio do Ano

https://mega.nz/