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).

If it is only on the keycap (and has not gone into the keyboard mechanism), my recommendation would be to let it dry. You can always get a replacement keycap off amazon or ebay. A trip to the Apple store may even get you one for free - if they happen to have a dead macbook hanging around out the back.

If you don't have filevault enabled, you can change your password via the macOS recovery (via google: https://nordpass.com/blog/how-to-reset-mac-password/)

if you do have filevault enabled, you'll either need your password to decrypt it in recovery mode. Not that if the issue is with the macOS installation, your password may actually work to decrypt your drive in recovery mode. If so, you should be able to reset your password using the steps in the link above.

Best of luck

You've fried the backlight driver. IIRC this is on the motherboard and would require a replacement. A replacement can be purchased on ebay (I think ifixit may also sell them). Replacing the board in a 2015 macbook air is quite simple - you just need the correct tools - a pentalobe screw driver and a torx screw driver. These can be purchased from ebay or amazon for a few dollars.

I agree 100%, this what I was actually told from an authorized repairer when I needed a battery replacement (they were going to charge over $200 for it).

To clarify, I was told that if I took my laptop to a place that Apple hasn't authorized, they'll use dodgy parts and likely install malware. I'm not saying that a repair shop would actually do that.

your only option will be to take it to an (and this is an Apple term) "UNAUTHORIZED REPAIRER who could also install malware on your computer). they'll likely replace it with an aftermarket battery - simply because Apple doesn't sell them any more.

Your alternative is to watch youtube videos, read the ifixit battery replacement guides, and then do it yourself. The important thing to note is the retinas have glued in batteries - apparently screws make laptops thicker (even though the battery on the airs are screwed in 🤷‍♂️). 99% isopropyl alcohol will help greatly in disoling the glue.

You can get USB enclosures from Amazon. But if you want to simply wipe the disk, you could create a linux USB using your windows PC and then boot your mac with that. Ubuntu works well on the 2015 macbook airs. The live USB will allow you to repartition the SSD.

2016 - 2020 are not worth anything these days. The 2016 and 2017 suffer from "flexgate" - in which the backlight cable is not long enough and eventually breaks - and they all suffer from "dustgate" - in which dust (or crumbs) can enter into the lower portion of the screen and break the tracks on the data ribbon cables, resulting in a pink screen to be displayed.

You're better off getting a 2015 macbook pro, or save up for an M series (in which Apple has fixed the dustgate design flaw - even though they've not yet admitted it to be a design flaw)

Silver, with a glowing icon, and display cables that don't break by opening and closing the laptop after the extended warranty period.

yep, though I believe this issue is different to the flexgate issue that happened for 2016 and 17 laptops (apparently it is called "dustgate"). for flexgate was the backlight cable breaking due to it not being long enough. Flexgate, on the other hand, is due to bits of dirt or other debris can enter into the screen while cleaning the hinge mechanism (where all the crap likes to gather). One in there, it can settle on the flex cables. When the screen is closed, the crap gets stuck between the cable and a piece of the laptop. The result is that the copper "wires" can break - resulting in the pink screen.

Here's a video that shows how it can be fixed https://www.youtube.com/watch?v=hQPRNRxcOWA

I've already purchased my replacement. A 2015 15 inch macbook pro i7 with 16GB memory for around $250 USD.