Very useful application.

The feature to set alerts and configure a profile really makes it stand out. I appreciate that, if the popup doesn't load while behind a VPN because the exit node IP got an activity warning, I can click the hyperlink right in the window to pass the cloudfare check, and it works on the next click of the camel icon. You can even run this on android via custom addon collection on FF Nightly or Mull (you have to trigger it through the menu, but it works).

I reserve one star because Amazon seems to be moving toward adding flat $ or %-off coupons that users "clip" by clicking a checkbox due to the psychological effect it has on shoppers, and this app does not yet consider those figures into the price, so sometimes the graph and price history don't paint the whole picture.

Active on all tabs since version 3.0.14. Otherwise very good add-on :)

Active on all tabs since version 3.0.14. This shouldn't be necessary because of the function of this extension.

I am not getting the Firefox problems others are reporting (I am UK) and find this extension incredibly useful. Even if it does collect data on what you're interested in it will not be any more than all the other sites you go to anyway so if it saves me money (and it has) it's well worth it.
I really like that for 3rd parties it includes postage in the calculation (unlike other similar sites or plugins). My only reason for dropping a star is not being able to take UK Amazon wishlists automatically like it can US ones and it's a long process (unless I'm missing something) to go through and remove the tracking once you've bought the item.

Great add on, only issue I have is it doesn't work with containers.