firefox-pageshield-cspreport-once.js

// npm i puppeteer
const puppeteer = require('puppeteer');

puppeteer.launch({
    headless: false,
    devtools: true,
    product: 'firefox',
}).then(async browser => {
    const page = (await browser.pages())[0];
    await page.setCacheEnabled(false);
    await page.waitForTimeout(10000);
    // first access
    let response = await page.goto('https://your-domain.example.com/pageshieldforcecsp00.html', {
        waitUntil: "load",
    });
    let headers = response.headers();
    await page.waitForTimeout(3000);
    if (/cf-csp-endpoint/.test(headers["content-security-policy-report-only"])) {
        console.log(headers["content-security-policy-report-only"]);
        console.log(headers["report-to"]);
        await page.close();
        await browser.close();
        return
    }

    for (i = 1; i < 20; i++) {
        // second access
        await page.setCacheEnabled(false);
        response = await page.reload({
            waitUntil: "load",
        })
        headers = response.headers();
        await page.waitForTimeout(3000);
        if (/cf-csp-endpoint/.test(headers["content-security-policy-report-only"])) {
            console.log(headers["content-security-policy-report-only"]);
            console.log(headers["report-to"]);
            await page.close();
            await browser.close();
            return
        }
    }
    await page.close();
    await browser.close();
});