I sometimes download a manual in HTML (e.g. the Blender manual). It would be nice if I did not have to adjust the zoom on every page therein from 100% to 150%, for example. It appears that Firefox 115.13.0esr and previous versions remember the zoom per local HTML file by absolute file path. I would like configurable local zoom remembrance by subtree path similar to online domains. A default local zoom other than 100% (as it is now) makes no sense, and I am not asking for such a thing. I am guessing that the best way to provide an explicit zoom-level-by-subtree feature is to have a settings area with a file browser to find and add local subtree roots with a description that says one zoom setting will apply to all HTML files within the subtrees of the listed root directories.