You chose to install Firefox, and you chose not to participate in the process that creates it. What happened next was not "without your consent". What happened absolutely had your consent. You consented by deciding that the whole messy process of producing the software was going to be someone else's problem, and you just wanted the sausage without having to see or take part in how it got made. You consented by delegating to the people who actually did the hard work of making and shipping the software.

If you now decide you don't want to run that software anymore, that's perfectly fine and is your choice to make. But arguing that you didn't have an opportunity to know what was going on or review code before it landed on your computer, when you installed Firefox by your own choice, when you decided not to take advantage of the radically transparent and open way it's built, is just not going to fly. You had a million and one opportunities to "review" the code you were going to download and run. You just chose to do other things instead. You seem to regret that, but you also seem not to have learned any lesson from it.