docs(academy-puppeteer): clarify disadvantages of browsers and unified cheerio parsing (#1442)

Co-authored-by: Honza Javorek <[email protected]>

Author: metalwarrior665

sources/academy/webscraping/puppeteer_playwright/executing_scripts/extracting_data.md

@@ -19,6 +19,12 @@ Now that we know how to execute scripts on a page, we're ready to learn a bit ab
 1. Directly in `page.evaluate()` and other evaluate functions such as `page.$$eval()`.
 2. In the Node.js context using a parsing library such as [Cheerio](https://www.npmjs.com/package/cheerio)
 
+:::tip Crawlee and parsing with Cheerio
+
+If you are using Crawlee, we highly recommend the [parseWithCheerio](https://crawlee.dev/api/playwright-crawler/interface/PlaywrightCrawlingContext#parseWithCheerio) function for unified data extraction syntax. This way, switching between browser and plain HTTP scraping is a breeze.
+
+:::
+
 ## Setup
 
 Here is the base setup for our code, upon which we'll be building off of in this lesson:

sources/academy/webscraping/puppeteer_playwright/index.md

@@ -25,7 +25,13 @@ Both packages were developed by the same team and are very similar, which is why
 
 When automating a headless browser, you can do a whole lot more in comparison to making HTTP requests for static content. In fact, you can programmatically do pretty much anything a human could do with a browser, such as clicking elements, taking screenshots, typing into text areas, etc.
 
-Additionally, since the requests aren't static, [dynamic content](../../glossary/concepts/dynamic_pages.md) can be rendered and interacted with (or, data from the dynamic content can be scraped).
+Additionally, since the requests aren't static, [dynamic content](../../glossary/concepts/dynamic_pages.md) can be rendered and interacted with (or, data from the dynamic content can be scraped). Turn on the [headful mode](https://playwright.dev/docs/api/class-testoptions#test-options-headless) (`headless: false`) to see exactly what the browser is doing.
+
+Browsers can also be effective for [overcoming anti-scraping measures](../anti_scraping/index.md), especially if the website is running [JavaScript browser challenges](../anti_scraping/techniques/browser_challenges.md).
+
+## Disadvantages of headless browsers
+
+Browsers are slow and expensive to run. In the follow-up courses, the Apify Academy will show you how to scrape websites without a browser. Every website can potentially be reverse-engineered into a series of quick and cheap HTTP calls, but it might require significant effort and specialized knowledge.
 
 ## Setup {#setup}