3 ms·

Why stay for so long though? Fetching an image is fast and using an automated browser is a bit overkill. Maybe they wait for 15 seconds in case the server is sl

• powera 10y ago
  Anti-virus. The post seems to be complaining that Facebook is using a browser, which probably means they're testing for malware.
• GauntletWizard 10y ago
  Or to detect JavaScript triggered malware or other nefarious behavior. Running a full headless browser for link scanning is actually quite doable for Facebook's scale.
• morgante 10y ago
  There are definitely some sites (particularly news sites) which can take 15 seconds to actually render the main content of the page.
• corecoder 10y ago
  JavaScript, webfonts, XHR... In my experience, if you don't wait most of the times you get a blank page.
• kochthesecond 10y ago
  Why not both? Also, they probably need a browser and to wait for a full render to be guaranteed a finalized image for their preview thumbnail.