Very basic and DIY.
If I for example try the URL of this page in APA-style (version 6 and 7). It should generate something like:
"PlagiarismCheckerX (2022, July 7). Hero Citation Generator – Deze extensie downloaden voor 🦊 Firefox (nl). Retrieved 19 February. 2025, from Addons: [this page's URL]."

But is does not...
Instead you have to fill in allmost all the fields yourself.
I mean: Author, Published date and the URL itself - you allways have to fill the URL otherwise it won't generate a citation ;o)
If you don't fill those items manually you will get something like:
"Hero Citation Generator – Deze extensie downloaden voor 🦊 Firefox (nl). (n.d.). Addons. Retrieved 19 February. 2025, from [this page's URL]."

Same goes for generating a citation for a image, then you also have to enter the URL for the image's location again(?)
Take the add-ons' logo here for example and give it a try.

So what is the difference from doing all this in a add-on or by copying & pasting it (using Ctrl+I for Firefox's page information) yourself?

PS. I can't even get a proper APA citation, even if I fill in all the fields at the moment!
For example: I can't make the citation of my first example: the author (PlagiarismCheckerX) is not even shown in the citation(!) and the name of the site (Addons) is in the wrong place according to APA 6 and 7.
Even if this add-on uses an old APA version, the author should at least be somewhere, right?

Bueno

Works great, easy to use. If it can't find all the information itself you can easily input the information. Easy to copy the finished citation and put into a document. Love it.

Very good, it works. would be 5 stars if it could automatically enter the website you're currently on and create the citation. Would also be cool if you could save your citations to a list.