You used that term, and frankly I recoil a bit a this term because of the implication that it’s not a deficiency of the software but that it’s the users who are wrong.
I wouldn’t say FF is deficient in this case - not being designed for your exact use case doesn’t mean there’s anything wrong with it.
As for opening 500+ tabs to buy a thing.
You do know that sellers now use algorithmic pricing and often there will be hundreds of sellers for the same thing.
Plus the price will be obfuscated with various artifices that all have to be overcome to find the best seller with the best price.
Defeating all of that means openning a shit-ton of tabs.
I usually only buy things if I agree with the price it’s being sold at. If I don’t I will look elsewhere but ultimately I value my time more than money. Extra money can be earned, time cannot 🤷♂️ If you have to drive 100 miles to a fuel station to save 2 cent per gallon, are you actually saving money?
Here’s an example of the process I’ve designed for aliexpress
https://github.com/igorlogius/gather-from-tabs/discussions/8
So it’s a script generating all the tabs?
Not sure what your coding level is but you could interact with and scrape the sites with python. I’m sure other languages have similar frameworks.
Even if you aren’t very familiar and don’t know any pythons, it’s a good one to learn and though it could take a while to learn enough to do what you want, you would be more motivated to figure things out and it would save you a lot of time (and money) in the long term.
https://realpython.com/modern-web-automation-with-python-and-selenium/.
https://www.projectpro.io/article/python-libraries-for-web-scraping/625