//context param contains acceptDownloads
let ctx = await firefox.newContext(contextParams)
let p = await ctx.newPage()

//this page download a blob and ensure it is not garbage collected
await p.goto("https://clever-elion-84f381.netlify.app/")

//this page download a blob without making sure the blob is not garbage collected
//await p.goto("https://upbeat-nightingale-6e32da.netlify.app/download")

//this page download a simple zip file
//await p.goto("https://c7ecc89a4366bf00.netlify.app/seekdasky-example")

let elem = await p.waitForSelector("a")
let blob = await new Promise((accept,reject) => {
    p.once('download',async (download) => {
        //I also tried in a non-async context with promise.then()
        let path = await download.path()
        let data = readFileSync(path,{encoding: 'utf8'})
        accept(data)
    })
    elem.click()
 })
console.log(blob)