There is no default STRIKE tag in the FF extension, I wrote my own and it does not even mildly do what you accused it of doing. FYI it is defined as "[STRIKE]_selection_[/STRIKE]" (the _selection_ bit means it will surround selected text, rather than _clipboard_ which asks you to past it in, or nothing there, which will indeed replace the selection with the contents of the tag definition).
I have no idea what your pictures are supposed to mean, absent that "you installed it", so... congratulations?
Google chrome devs are no easier to get in touch with than Mozilla devs, but if you have a real problem and know what you are talking about I suspect either group will be responsive. Your complaints about the Mozilla devs specifically, indicate a subconscious bias.
There is absolutely no reason for them to be embarrassed about asking for donations. I am willing to bet they get thousands of
cranks like you complaining about it every year, fortunately they also get enough donations from people who care enough to support their existence. It isn't exactly uncommon for open-source development teams to ask for donations.
Most of the software in the average person's computer relies heavily on or is offered for free.
MANY of them would never exist in any significant way if they never received donations. Most/all have enriched everyone simply by existing, even if you don't use them
-- case in point: Firefox pushed the web to its limits and jumpstarted the evolution of the modern browser.
You use a free product, it isn't unreasonable to be asked politely and in an unobtrusive way if you would like to support its future development.
Please stop confusing your confusion with how to use one unaffiliated extension, with fundamental problems in the development process of Mozilla itself, or whatever it is you seem to be upset about.
