See if this one still works, https://addons.mozilla.org/en-US/firefox/addon/h264ify/. I’m checking out their github now. Seems like some people have issues with it now making videos laggy, but some people claim it still works.
I tried the extension myself, and I didn’t experience any lag, but I noticed that it locked me out of any resolution above 1080p when I used it.
it seems like it works but im still not super happy with it. Im at 43 degrees rather than the 48-55 it was at before. But on win10 itll fall down to 37-40. Thanks for all the help! Definitely better than how it started 
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No problem, for general battery stuff. Try tlp if it isn’t installed already.
Edit: Unless you have power-profiles-daemon installed. In that case, use that.
temps still rise eventually, so frustrating. not sure what to do im gonna look at the power-profiles-daemon now
Cool, but one thing to note is that the temperature measurement between windows and linux isn’t the same, so it may actually be the same temperature on both OS’s but measured differently. So one might report higher than the other.
thats understandable but on windows i dont feel the heat, but with linux i feel my laptop getting hotter and sometimes the fans even spin. i hope i can figure this out 
That is certainly a problem. I wonder if you can create a custom fan curve on that laptop. I have to use one on my nvidia gpu because for whatever reason the bios settings decide that the lowest fan speed is always the correct one. No matter how high the temperature gets. The fan speed will always be at the lowest setting if I don’t manually change it or use a tool like greenwithenvy to apply a custom curve.
Hmm maybe, I’ll keep messing around and hope i find a fix. Its honestly a bit of a deal breaker for me though unfortunately. Regardless thanks for all the help
I have found some people suggesting the package thermald made by intel. I have not used it myself, but may be worth a shot. I’ll keep researching the issue though and see what else I can find on the topic though.
Cool, glad to be of service.
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I have thermald installed, it was my first go to when encountering the issue. It didnt do much to solve the youtube video high temps though. Again im kinda new so its likely it could be a user error but who knows i suppose
No problem. I never even used it. It was just something I saw. Do you happen to use a desktop environment? I have kde installed on my desktop and laptop. I have been doing my testing for this thread on an old laptop I had lying around with endeavour installed. Particularly because it has intel cpu and integrated graphics. In kde with power-profiles-daemon installed. If I click on the battery widget, there is a slider that lets me change the performance of the cpu I believe. I’m not sure if it will have much effect, but try changing it to power saving mode. I believe linux systems in general default to performance mode at all times.
i do have kde installed, ill switch it to power saver mode and test again rn. honestly seems about the same to be fully honest. What would you recommend i do? Fresh install of endeavour maybe? Also is your old laptop running just fine? Just a random thought, maybe i should try the other intel driver? my cpu is the i5-8365U with Mesa Intel® UHD Graphics 620 iGpu. what do you think?
I doubt a fresh install would do anything although I’m not sure how old the system is. My laptop is pretty old. Still running a hard drive. It is a intel core i3-7100U. Not a very powerful machine.
I do my actual work on my desktop. It runs fine with no heating issues, but again it is not very powerful to begin with.
I have a newer but still pretty old i7 laptop, but it is like the last dual core i7 intel ever made. It is one of the first thin and light laptops made, back when thin and lights were just becoming a thing. It is really thin. It is running windows and it gets warm doing literally anything involving video. Watching video, remote desktop. Somehow the older laptop doesn’t have any issues though, so I think that is different than your problem.
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hmmm ill try and figure it out tomorrow. Too much of a headache rn. Really annoying issue but oh well
For anyone wondering. EVERYTHING IN THIS THREAD WAS THE SOLUTION. however! YouTube’s “Ambient mode” was the last puzzle piece. I turned it off and poof. im rarely going over 41! MUCH better than the slow creep up to 50 degrees! I’ll do some more testing and report back if any issues arise
Note: I turned off the firefox extension and it made temps go up, so if you have a similar issue follow the thread AND turn off that dumb YouTube ambient mode.
With all fixes + ambient mode off:
20 minute test showed me at 42 degrees about twice and stood around 39-41
Much much happier now with the system!
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