copai

Installation

NixOS

{
  copai = {
    url = "github:inet4/copai";
    inputs.nixpkgs.follows = "nixpkgs"; # optional to prevent duplicates
    inputs.firefox-extensions.follows = "firefox-extensions"; # optional to prevent duplicates
  };
}

The signed firefox extension can be accessed using:

  copai = copai.packages.${system}.default;

And then added as an extension. For example:

programs.firefox.profiles.default.extensions.packages = [ copai ];

Local Installation

This is a firefox extension. In order to use it, first download and unzip the add-on.

Note: In the future, it may also be available on addons.mozilla.org.

Open any firefox-based browser and visit about:debugging#/runtime/this-firefox. Then scroll down until you see Temporary Extensions. Press the Load Temporary Add-on... button and select any file inside the unzipped directory.

Now you are good to go!

Usage

Setting the API Key

Use p to set your OpenAI API key.

sk-proj-...

Copying the question

In order to answer a specific questions, it must first be copied to the system-clipboard. Some websites disallow copy-operations, thus the re-enable-right-click extension may be required.

Fetch Solutions

After copying a question to your clipboard, you can press a to fetch the answer to the question. This only works for questions that are text-only.

Display Answers

In order to actually view the solution, you must keep the l key pressed. The list of solutions for the current question will appear on the bottom right.

Troubleshooting

There may be problmes if the API key is invalid or doesn't have enough quota. Make sure that you use a key that is able to query models successfully. c

This can be tested using:

curl "https://api.openai.com/v1/responses" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    -d '{
        "model": "gpt-5",
        "input": "Write a one-sentence bedtime story about a unicorn."
    }'