The longer the distance, the larger the diameter of the wire you need, due to resistance/heat.

Typically, extension cords are going to be manufactured with the thinnest wire they can get away with based on the safety requirements, in order to save on materials cost.

So plugging 2 short cords together might cover the same distance as 1 longer cord, but the longer cord will use thicker wire to maintain the proper margin of safety.

I haven’t tried this so I can’t vouch for it, but it looks like you can add custom domains to a whitelist per https://support.mozilla.org/en-US/questions/1292986

So in your case, something like

browser.fixup.domainsuffixwhitelist.work = true

may work.