I am the author of that add-on ... what would you do in my shoes ? - provide an XPI (that will only benefit the few since the side-loading process is made awkwarder at every point release) ? - fight it ? If so, on what grounds and how ? - something else ?
That's an entirely serious suggestion. I'm not arguing that what you're doing is illegal. I have all sorts of qualms with copyright and its enforcement myself. If I were "copyright czar", movies would get three years, and newspapers maybe a week.
But if we wish for copyright-holders to respect the rights of internet users, it would seem to be a winning proposition to maybe not actively work against their attempts to find a compromise.
And a "soft paywall" that allows you to read a dozen or so articles per month without subscription seems to be jus that: a compromise, and a reasonable one at that.
What do you expect to be the long-term outcome of bypassing such mechanisms? I have trouble of thinking of anything but "soft paywalls" turning into "hard paywalls". Then, we'll be left with the maybe one or two publications we subscribe to. How can such an outcome be in anyone's interest?
I know you can bypass these schemes. Yes, they are laughable. I know ads are sometimes annoying. I know large swaths of the press have earned your scorn because they, like, use the wrong JS framework. Or something.
But I still don't understand this attitude that appears to go even further than just "I want it for free" to an almost gleeful appreciation of vandalism destroying the foundations of democratic societies.