How to disable the use of fork-function in firefox 121 or later

Im trying to port Firefox to a new environment which has limited resources. And Firefox already sends around 200 messages to the X server. However, is there a way to disable the use of fork-function in firefox 121+, so that all decoding would take place within the same process.

For example, is there an environment variable or an addition to user.js, which would disable the use of fork-function ?

Im using version Firefox 121 from Linux Mint 64bit for porting.

This forum isn’t very active, but there are resources for getting help in the Matrix.

Getting started: Matrix - MozillaWiki

Rooms: Matrix:Rooms - MozillaWiki

As your question in #dev-help (listed on that page).