In safari, each tab is a new private session, so there’s no way around it - unless you use something other than safari for private browsing.

Prior to deleting AlDente, did you follow the uninstall procedure

https://apphousekitchen.com/how-to-uninstall-aldente-pro/

If not, I’d recommend reinstalling it, then do the above steps prior to uninstalling.

if the laptop is a 2012 or later, have a look at opencore legacy patcher (https://dortania.github.io/OpenCore-Install-Guide/)

I’m running Sonoma on a 2013 macbook air, 2x 2014 macbook airs, 2x 2015 macbook airs (all 11 inch, 4gb), a 2012 macbook pro (with the dvs, 16GB ram) and a 2015 macbook pro (i7 16GB ram).

I recently picked up a 15 inch 2015. Temperatures sit around 60°C (noting it is almost summer here), fans are around 2000rpm. They are not audible over the ambient noise in the room. When the fans do spin up to max they are noticable. They’re comparable to the fans on the 2018 and 2019 pros.

1080p video playback (youtube) does not induce audible fan noise, nor does basic web browsing. Geekbench and cinebench do get the laptop cooking though (temperatures hover around 96°C)

Let me guess… this is a 13 inch 2018 macbook pro. If so, you’re the proud owner of a macbook pro that has suffered what is being called (smh) “dustgate”, in which pieces of dust and debris can get behind the plastic screen cover (that has the Macbook Pro label on it) in two places that happen to coincide exactly with the position of the two data flex cables. When the screen is open, this debris can happily sit on the cable, but when the lid is closed, the cable pulls tight against the cable guide and between the guide and cable, the debris is trapped. If you’re unlucky, the debris can pierce the flex cable and break one of more of the data tracks within. In Apple’s obsession with thinness, the cables do not plug into the screen, but rather are soldered onto the PCB within the screen. What’s worse is that the PCB is actually behind the screen, so to replace the cable means to dismantle the screen - usually resulting in a destroyed LCD panel.

I too have suffered from this situation and for the interim, my 2018 has now become an under desk mounted clamshell desktop machine. I’m also rocking a 15 inch 2015 macbook pro (i7, 1TB SSD, 16GB ram) which I got myself as a replacement (don’t tell my wife).