Glossary term
What is bfcache (Back/forward cache)?
bfcache stands for Back/forward cache.
The browser keeps a whole page in memory, with its JavaScript state. When you press Back or Forward, the page appears again at once.
Learn it properly · The Browser ContractLesson 0: What Happens When You Type a URL (The Full Version)The full trip from pressing Enter to seeing pixels: DNS, TCP, TLS, HTTP, then reading the page and painting it. Caches skip most steps. Every other lesson in this series fits on this map.