So, after many hours of work I have finished, more or less, the Kempelton 2.0 theme for Firefox. For this version, every icon has been recreated from the ground up. This was necessitated by my move from Paint Shop Pro to Inkscape, but the quality has been significantly improved in the process. I have been even more careful in the design than before, paying much attention also to the less frequently visible icons.
Not only is Kempelton 2.0 my best work yet, I’m also making the original vector files available under a Creative Commons license, allowing you to use and modify them, under some conditions. I expect to expand on the number of icons in the future, with new Thunderbird icons for example.