guide:

How to Make Youtube Videos Buffer All The Way Like The Old Days (In Firefox)

Remember when you could pause a video on, like, Youtube and wait and it would eventually load the whole thing so you could watch it with no buffering?

Comic of a guy pausing a Youtube video and reminiscing tearfully about the old days where it would buffer all the way to the end

I happened across a tumblr post detailing some settings to accomplish that in modern Firefox, and I wanted to document it here.

I can't guarantee that this won't stop working at some point amidst the constant churn of arbitrary updates to websites and browsers alike, but it works for me right now, and if I learn about an updated method this is where it'll be.

How to do it

In about:config, change the following settings:

Set media.mediasource.enabled to false
Set media.cache_readahead_limit and media.cache_resume_threshold to 9999