Which extension best tracks price drops in my Amazon cart?

I went through this exact stress when I was building my 4090 rig last winter. Honestly, the price swings on high-end mobos and RAM are totally insane. Most of my luck came from testing a few different extensions to see what actually pings fast enough. First off, Honey is pretty popular. Its super user-friendly and great if you just want it to do the work in the background, but honestly, I found it a bit slow for those lightning-fast price drops on PC parts. Like, by the time I got the notification, the stock was already gone. What actually made me satisfied was diving deeper into Keepas tracking alerts instead of just looking at the graphs. Setting it up to ping my desktop the second a price hit my specific target was a game changer. It is a bit more manual work to set up for every single component in your build, but it is way more reliable than anything else I have tried. No complaints at all once its running. Tried Capital One Shopping too, but it can be a bit of a resource hog which you mentioned you wanted to avoid. TL;DR: Use the specific alert feature in Keepa for the fastest pings on hardware, Honey is decent for casual tracking but often too slow for flash sales. There is this tool called Cart To Link that basically automates the whole cart sharing process, works across different regions too.