Seems to slow down youtube considerably

[Nodrance]

When I have sponsorblock enabled, the player lags considerably. Playback isn't affected, but seeking definitely is. It can have a delay of 15-20 seconds after i seek before it does it.

I suspect this is a cross compatability issue, here is my list of currently enabled extensions

This has persisted across several months, with updates to both firefox and sponsorblock in that time

[X13X]

Yeah something is going on behind the scenes that noone is talking about.

I have a baremetal system that seems to lag whenever SB is enabled, and yet noone wants to talk about this -_-

[AvianAnalyst]

I'm also having this issue. Pausing and playing hte video also has a lag of many seconds before it happens. Also if I close a tab playing a youtube video, I continue to get audio from the video for several seconds after the tab is closed. If skipping is disable, but the extension is still enabled, I don't have these issues. If i enable it and refresh the page it causes the same problems immediately

[yowidin]

Same here. Checking about:processes shows that most of the time is spent in GC 🤔

[sskodje]

I just had to uninstall the extension for this reason. When installed and browsing through a channels video feed, the extension runs code and network requests for every video scrolled through, causing quite large delays and huge memory usage + lag due to garbage collection. I can't see why the extension should need to run any code at all when youtube is just displaying a thumbnail you haven't even clicked on.