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

How to download and manually install Run Javascript extension for Chrome

Looking for a way to install Run Javascript extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Run Javascript extensions manually, this article outlines two simple methods to effortlessly install Run Javascript extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Run Javascript extension and manually install through Drag &Drop

If you ever need to manually install a Run Javascript extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Run Javascript Extension by clicking the "Download CRX" button on the website.

Look for the Run Javascript extension you wish to install. Go to the website and download the Run Javascript extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Run Javascript extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Run Javascript extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Run Javascript extension for Chrome and install in Developer Mode

This is another method to install Run Javascript extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Run Javascript extension file

Select and download the Run Javascript extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Run Javascript extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Run Javascript extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Run Javascript extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Run Javascript extension in 2 ways. We hope this guide proves helpful.

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.