Ever wish you could automate those boring, repetitive tasks you do in your browser, like filling out forms, clicking buttons, or scraping data without writing a ton of code? With Google Gemini, that’s totally possible. It’s a powerful AI tool that can understand what you want to do and help you control your browser like a pro. Whether you’re managing emails, collecting info from websites, or streamlining workflows, Gemini makes it surprisingly easy to get things done on autopilot. 

This tutorial teaches you how to set up Nanobrowser's free Chrome extension with Gemini AI to automate complex browser tasks through simple natural language commands. We’ll show you how to install and configure Nanobrowser, configure your AI model, and write prompts to automate mundane tasks. 

 By the end of this tutorial, you’ll be able to:

• Install and configure the Nano browser
• Select your AI model
• Write prompts to automate search and emailing tasks.

Let’s dive into it right away!

Step 1 - Install and configure Nanobrowser

Nanobrowser is a free, open-source extension that turns your browser into an AI-powered assistant. It brings large language models like Gemini, GPT-4, or Claude directly into your browsing experience, allowing you to automate routine tasks with a simple prompt.

Here's what makes it stand out:

• It runs entirely in your browser, keeping your data private and secure.
• It’s designed around AI agents that can plan, click, read, and double-check their own work.
• It supports multiple AI models, allowing you to select the one that best suits your needs.

You can fill out forms, navigate multi-step workflow or gather information across websites. 

It’s a good start. However, it may not be able to do many things. Let’s see what it can do. 

Open a Chrome browser and navigate to the Google Web Store. 

Search for ‘Nanobrowser.’ Click the only result that displays for the Nanobrowser and install the extension. 

Click ‘Add to Chrome.’ This will install the extension on your Chrome browser. 

Go to the ‘Extensions’ sidebar and click the pin icon to pin the extension for ease of access. 

Click the nanobrowser icon. We need to set it up to utilise Gemini’s latest AI model. Click ‘open settings.’ or the cog icon at the top right corner of the sidebar popup. 

In the settings, click ‘Add new provider.’ This will add Gemini as the provider of the AI chatbot. You can add APIs of ChatGPT, Claude or even Deepseek. We have decided to use Gemini because it’s from Google and has good compatibility with Google Chrome. 

To obtain a Gemini API for this extension, go to Google AI Studio. Log into your account and click ‘Get an API key.’ It is located in the top right corner of the AI Studio screen. 

Click the blue button title, ‘Create API key.’ 

Google will ask you to specify the project. Click ‘Gemini API’ in the dropdown menu. 

Generate the API key by clicking ‘Copy.’

Go to Nanobrowser settings and paste this API key in the proscribed textbox. Click ‘Save.’

Step 2 - Select your AI model

After adding the API key, scroll down and click to select the Gemini AI model from the drop-down. We recommend selecting Gemini 2.5 Flash Preview. 

You can set the temperature and Top p values. However, we recommend leaving the Top P value as it is and setting the temperature to 0.8. Select the Gemini 2.5 flash for all the navigator, validator, and speech-to-text models. 

Go to the general tab. You can set the automation behavior here.

Step 3 - Write prompts to automate search and emailing tasks

Here comes the best part. Let’s say you want to search for an iPhone cable on Amazon.com. Click the Nanobrowser extension icon in your browser and type your prompt. 

Prompt:

Find a long lightning cable for iPhone 15 on Amazon.com and add it to my cart. 

It will start with the planner. Once the planning phase is complete, it will locate the cable and add it to your cart. Within 10 seconds, it searched for the lightning cable and added it to my cart. 

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You can automate tedious tasks, such as filling out a form. Let’s say you want to send an email to a support address requesting a change to your subscription from the standard plan. 

Prompt:

Send the email to support@dupple.com. Write the subject. Change my subscription plan in the message body. Type the email asking to change the subscription plan from monthly to annual. 

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It opened Gmail. Clicked the compose button, wrote the email. Then it clicked the send button automatically. That’s fantastic. 

That’s it for this tutorial, folks. Experiment with Nanobrower by instructing it to do some complex tasks. Figure out the chores you have to do and prompt Nanobrowser to do the tasks for you while you focus on tasks in other tabs.