Build

cd popup
npm i
npm run build
cd ..
npm i
npx web-ext run --devtools --start-url bing.ca

Inner loop

In a terminal

cd popup
npm run nodemon

Run this task

// Place your key bindings in this file to override the defaults
[
    {
        "key": "alt+b",
        "command": "workbench.action.tasks.runTask",
        "args": "Run"
    },
]

Build xpi

npx web-ext build

or

zip -r -FS ../ext.zip * --exclude '*.git*'