local filter  = require "make4ht-filter"
local removeHeight = function(s) return s:gsub('height="%d+"', '') end
local removeWidth = function(s) return s:gsub('width="%d+"', '') end
local removeMaxWidth = function(s) return s:gsub(' max-width: %d+px;', '') end
local removeFixedSettings = function(s) return removeMaxWidth(removeWidth(removeHeight(s))) end
local process = filter{removeFixedSettings}
Make:latexmk {}
Make:match("html$",process)