That is not that easy as it sounds: First of all the UXP-framework is not building on 32bit as they use a very inefficient and memory-consuming build-system and second no UXP-application is here at Hyperbola done directly by us. So Luke can only help here: https://pagure.io/iceweasel-uxp
Furthermore the more newer version, the more possible problems go into the package for the webbrowser. Hyperbola is a minimalist system and therefore we would even go that far to remove a package before its dependencies go out of hands. That leaves a functional and efficient system and that is our goal.
For Hyperbola GNU/Linux-libre there is no timeline at this current moment to upgrade the UXP-applications. for HyperbolaBSD there is porting in the making. But again: 32bit is not that easy. And that shows how inefficent and respectless some applications and projects act today - relied towards UXP and Mozilla in generic also for their Rust-effort.
An operating-system must have to work in the meanings of the user and in the hands of the user, this is excluding a webbrowser when it is a high security-risk and not efficient fullfilling only the basics: Rendering HTML-pages, as said not more. A webbrowser is an optional application. But if the community has an idea to update UXP (32bit / 64bit) or some other solution? Exactly that is now the time after 0.4.3.
Human being in favor with clear principles and so also for freedom in soft- and hardware!
Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!