Run custom Javascript, each time you visit a website

Latest Version

Version
3.0.1
Update
June 14, 2024
Size
2.18MiB
Developer
Category
Users
30,000+
Rating
4.21739 ★
Manifest Version
2
Web Store Status
Languages Support
English
See more
Permissions
Storage
ActiveTab
See more

Run Javascript Extension

Run custom Javascript, each time you visit a website.

This extension is particularly useful to web developers and people who like to tamper with websites they frequent by injecting additional javascript to manipulate the DOM.

Add in any javascript you like and it will automatically be executed everytime you visit the website in the future.

jQuery 3.3.1 is pre-loaded, so you can use all the $ magic immediately!
Read more

Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Run Javascript", "description": "Run custom Javascript, each time you visit a website", "version": "3.0.1", "permissions": [ "storage", "activeTab" ], "browser_action": { "default_title": "Run Javascript", "default_icon": "icon.png", "default_popup": "popup.html" }, "icons": { "16": "icon.png", "32": "icon-32.png", "48": "icon-48.png", "64": "icon-64.png", "96": "icon-96.png", "128": "icon-128.png", "256": "icon-256.png" }, "background": { "scripts": ["background.js"], "persistent": true }, "content_scripts": [ { "matches": [ "http://*/*", "https://*/*" ], "content_security_policy": "script-src 'self' https://www.google-analytics.com; script-src 'self' 'unsafe-eval'; object-src 'self'", "permissions": ["lib_jquery_3_3_1.js", "lib_jquery_2_2_4.js", "lib_jquery_1_12_4.js"], "js": ["lib_jquery_3_3_1.js", "inject.js"], "run_at": "document_idle" } ], "manifest_version": 2}
Read more

Similar Extensions

icon

InjectCode Extension · Developer Tools 30,000+ 26 ★ 215KiB

icon

Enable JavaScript Extension · Productivity 30,000+ 6 ★ 197KiB

icon

Toggle JavaScript Extension · Developer Tools 30,000+ 183 ★ 24.5KiB

icon

JS Inject Extension · Developer Tools 30,000+ 0 ★ 551KiB

icon

exec JavaScript Extension · Developer Tools 30,000+ 1 ★ 329KiB

icon

User JavaScript and CSS Extension · Developer Tools 30,000+ 564 ★ 1.62MiB

icon

Javascript Injector Extension · Developer Tools 30,000+ 9 ★ 59.53KiB

icon

JS-Exec Extension · Productivity 30,000+ 3 ★ 1.83MiB

icon

Javascript & Css auto injection Extension · Developer Tools 30,000+ 14 ★ 899KiB

icon

JScript tricks Extension · Developer Tools 30,000+ 50 ★ 340KiB

icon

Witchcraft: JS/CSS injector Extension · Developer Tools 30,000+ 10 ★ 27.24KiB

icon

Custom JavaScript for Websites 2 Extension · Developer Tools 30,000+ 129 ★ 588KiB

icon

RMS (Run My Script) - Script runner Extension · Developer Tools 30,000+ 7 ★ 9.87KiB

icon

Scripty - Javascript Injector Extension · Productivity 30,000+ 69 ★ 22.85KiB

icon

JavaScript Injector Extension · Developer Tools 30,000+ 33 ★ 397KiB

icon

Quick Javascript Switcher Extension · Developer Tools 30,000+ 804 ★ 203KiB

icon

Console Injector Extension · Developer Tools 30,000+ 12 ★ 20.4KiB

icon

Web Injector Extension · Developer Tools 30,000+ 8 ★ 152KiB

icon

Code Injector Extension · Developer Tools 30,000+ 10 ★ 110KiB

icon

User CSS Extension · Developer Tools 30,000+ 264 ★ 298KiB

icon

Page Manipulator Extension · Developer Tools 30,000+ 35 ★ 2.17MiB

icon

Live Custom CSS,JS injector on pages Extension · Developer Tools 30,000+ 35 ★ 140KiB

icon

Chrome extension source viewer Extension · Developer Tools 30,000+ 422 ★ 227KiB

icon

jQuery Injector Extension · Developer Tools 30,000+ 26 ★ 57.7KiB

User reviews

icon

Rhett Greenway (ID: 000000c72e41c0db) Voted 3 ★ - Updated 09/12/2023 this thing worked great until today it wont save anything.

icon

John and Jane Doe (ID: 0000001e33a5690a) Voted 3 ★ - Updated 05/14/2023 Works pretty well (despite runtime.lastError; try putting your code in JQuery document ready). I wish it could be set to work on specific pages rather than whole domains.

icon

Kirill Karis (ID: 0000009598c07bc1) Voted 4 ★ - Updated 03/04/2023 Great but localhost raises error: "Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.". And please make it open source!

icon

Oleksa Yaremchyk (ID: 000000f16f520a34) Voted 5 ★ - Updated 01/21/2023 Very useful extention, I've created personal UI for each site I frequently visit

icon

Bobby Jack (ID: 0000001cc5ba40c3) Voted 1 ★ - Updated 01/18/2023 I love the promise, but this currently gives the following error: Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist. Looking for an alternative.