Table of contents


“A Step-by-Step Guide to Chrome Extension Development” provides a comprehensive and systematic approach to creating Chrome extensions. From defining objectives and designing the user interface to implementing functionalities, integrating APIs, and optimizing performance, the guide equips readers with the knowledge and tools to build feature-rich extensions. To exemplify the practicality of these steps, we will showcase how Creole Studios, as Chrome extension developers, developed the “Enrolup” Chrome extension. 


Chrome extension development has revolutionized web interactions, particularly for small business owners, offering personalized tools that optimize tasks, integrate services, and tailor web pages. This customization boosts productivity and streamlines workflows, presenting a powerful symbiosis between Chrome extensions and business operations.

Read More: Start Exploring Chrome’s Must-Have Extensions

Enrolup Chrome extension” is a valuable tool for universities developed by Creole Studios. It enables them to understand the limitation they might have on the course offering page of their website. It helps and suggests how can they improve their page conversion and increase user engagement, leading to a higher rate of course enrollment and success.

Chrome Extension Development Steps

Step 1: Define Objectives and Features

  • Start by defining the objectives and purpose of your Chrome extension. Decide on the core functionalities and features you want to include.

Objective’s Enrolup extension

  • Tool for universities and education providers to show how to improve conversions for course website pages.
  • Enables users to analyze an unlimited number of course website pages for their conversion potential.

Step 2: Create the Project Structure

  • Create a new folder for your extension and organize it with the necessary files.
  • Required files include manifest.json, popup.html, popup.js, background.js, and any other assets or scripts.

Structure for Enrolup extension:

  • To keep our development organized, we set up a new project folder named “EnrolUpExtension.” This folder contained all extension files and assets.

Inside the folder, we created the following files:

  1. manifest.json: This file held critical information about the extension, including its name, description, version, permissions, and icons.
  2. popup.html: We designed the user interface for the extension’s popup, where users accessed course recommendations and other details.
  3. popup.js: The JavaScript code was implemented to handle the functionality of the popup.
  4. background.js: We developed the background script responsible for handling events and interactions that occurred in the background.

Step 3: Manifest File

  • In the “manifest.json” file, specify essential metadata, such as the extension’s name, description, version, and icons.
  • Declare the necessary permissions for the extension’s functionality, such as accessing web pages or data.

Manifest file for Enrolup extension:

  • In the “manifest.json” file, we defined the necessary metadata for the extension, such as the name, description, version, and icons.
  • Next, we specified the required permissions, including access to web pages and data, essential for the extension’s functionality.
  • We set up the browser_action property to define the appearance and behavior of the extension’s browser action, i.e., the popup.
  • Finally, we included the background script to enable communication between the popup and the background.

Step 4: Designed the Popup User Interface

  • Design an intuitive and user-friendly popup interface using HTML and CSS in the “popup.html” file.
  • Customize the popup’s appearance to match your extension’s branding.

Interface Enrolup extension:

  • At Creole Studios, we designed an intuitive and visually appealing popup interface for the EnrolUp Chrome Extension.
  • JavaScript code was implemented in the “popup.js” file to add functionality to the popup.
  • We utilized event listeners to handle user interactions, such as button clicks or form submissions within the popup.
  • The pop-up served as the gateway for users to access essential features, including course recommendations, university ratings, program details, and user reviews.

Step 5: Implemented Popup Functionality

  • Write JavaScript code in the “popup.js” file to handle user interactions and fetch data if required.
  • Ensure the popup’s functionality aligns with the extension’s objectives.

Popup for Enrolup extension:

  • In the “popup.js” file, we wrote JavaScript code to fetch and display course recommendations and related data from the universities’ databases or APIs.
  • To enhance user interactions, we implemented features such as filtering courses, sorting options, and the ability to view more details for each course.
  • We ensured a seamless user experience by handling errors gracefully and providing helpful messages when necessary.

Step 6: Background Script Functionality

  • Create the “background.js” file to handle events and interactions that occur in the background.
  • Set up communication between the popup and the background script if needed.
  • Depending on your extension’s requirements, you can include additional features like context menus, notifications, or browser actions.

Scripting for Enrolup extension:

  • To create a seamless experience, we leveraged the “background.js” file as the backbone of the EnrolUp Chrome Extension’s functionality.
  • The background script ran continuously in the background, managing events and interactions beyond the scope of the popup.
  • It facilitated communication between the popup and content scripts, ensuring seamless data exchange and action coordination.
  • The background script also handled background tasks, such as periodically updating the extension’s data and managing user preferences through the Chrome storage API.
  • By employing the background script, the EnrolUp Extension delivered a consistent and reliable user experience, even when the popup was closed or not in focus.

Step 7: Integrate APIs and Databases (if applicable)

  • If your extension needs to fetch real-time data, integrate APIs or databases accordingly.
  • Implement mechanisms to update the extension’s data periodically.

API’s for Enrolup extension:

  • Currently, we have not done any API Integration. To ensure real-time data availability, we have the capability to integrate APIs or databases from universities to fetch course and program information if required.
  • We implemented mechanisms to update the extension’s data periodically, ensuring that the information presented was up-to-date and accurate.

Step 8: Tested and Debugged

  • Thoroughly test your extension on various web pages and scenarios to ensure it functions correctly.
  • Debug any issues or errors that arise during testing.

Testing of Enrolup extension:

  • Thorough testing was crucial to create a reliable extension. We tested the EnrolUp Chrome extension on various web pages and scenarios to ensure it functioned correctly.
  • In the testing phase, we also debugged any issues or errors that arose, making the extension stable and dependable.

Step 9: Optimized Performance

  • Optimize your extension’s code and assets to ensure smooth performance and fast loading times.
  • Minimize the use of resources to prevent any negative impact on users’ browsing experience.

Optimization of Enrolup extension

  • For a seamless browsing experience, we optimized the extension’s code and assets to ensure smooth performance and fast loading times.
  • Minimizing the use of resources prevented any negative impact on users’ browsing experience.

Step 10: Publish on Chrome Web Store (Optional)

  • If you wish to make your extension available to a wider audience, you can publish it on the Chrome Web Store.
  • Follow the submission guidelines and review process to get your extension approved.

Publishing of Enrolup extension:

  • Once the EnrolUp Chrome extension was ready, we packaged it into a zip file.
  • We uploaded the extension to the Chrome Web Store for review and publication, making it accessible to a broader audience.


In conclusion, Chrome extension development is an exciting and rewarding journey that allows developers to create powerful tools and enhance the browsing experience for millions of users. With our step-by-step guide and the essential steps, we hope you have a clear roadmap to embark on your extension development project. As Chrome extension developers, we would emphasize that each step needs utmost attention and review. 

In case you need any help with the Chrome extension development process, we at Creole Studios would be happy to support you.

Bhargav Bhanderi
Bhargav Bhanderi

Director - Web & Cloud Technologies

Launch your MVP in 3 months!
arrow curve animation Help me succeed img
Hire Dedicated Developers or Team
arrow curve animation Help me succeed img
Flexible Pricing
arrow curve animation Help me succeed img
Tech Question's?
arrow curve animation
creole stuidos round ring waving Hand

Book a call with our experts

Discussing a project or an idea with us is easy.


Love we get from the world