I have made functioning solution.
I have decided to work according to The instructions which are published
here.
https://wiki.debian.org/accessibility-devel
I have installed packages which have been described in The article.
I have installed LXDE
And then I typed
Openbox &
orca &
startlxde &
firefox &
And viola. Firefox cooperates with Orca.
I Am fighting with one big problem. I do not know, how to disable 3D
graphics by using some of GTK window managers, which are compatible with
Orca.
Many crytical errors are making Firefox process slower and slower. But
Orca build in navigation keys are working like a charm. I will try to
analyse window managers configuration files /etc if I will have some
chances to disable various graphics decorations. And 3D graphics
instructions.
But I Am very very glad, that I Am not having problems with Android
build in memory management. No memory allocation issues, no not enough
memory messages.
So it is always necessary to have some complete desktop environment
started before running Firefox in The Android by using Termux or other
project based on Proot module.
