Building Firefox on powerpc64

[Francis Little]

Hi, is anyone else able to build Firefox on powerpc64 (PowerMac G5), I'm
getting an error:

(This was run with with MAKE_JOBS_UNSAFE=yes in /etc/make.conf after it
failed the first time.)

Executing "/usr/local/bin/node
/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/build/copy-module.js
/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/src/main.js
/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/src/vendors.js"
Failed with Command '[u'/usr/local/bin/node',
'/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/build/copy-module.js',
'/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/src/main.js',
'/usr/ports/www/firefox/work/firefox-66.0.5/devtools/client/debugger/new/src/vendors.js']'
returned non-zero exit status -4.  Be sure to check that your mozconfig
doesn't
            have --disable-nodejs in it.  If it does, try removing that
line and
            building again.
gmake[5]: *** [backend.mk:18: .deps/node.stub.stub] Error 1
gmake[5]: Leaving directory
'/usr/ports/www/firefox/work/.build/devtools/client/debugger/new/src'
gmake[4]: *** [/usr/ports/www/firefox/work/firefox-66.0.5/config/
recurse.mk:101: devtools/client/debugger/new/src/export] Error 2
gmake[4]: Leaving directory '/usr/ports/www/firefox/work/.build'
gmake[3]: *** [/usr/ports/www/firefox/work/firefox-66.0.5/config/
recurse.mk:34: export] Error 2
gmake[3]: Leaving directory '/usr/ports/www/firefox/work/.build'
gmake[2]: *** [/usr/ports/www/firefox/work/firefox-66.0.5/config/
rules.mk:415: all] Error 2
gmake[2]: Leaving directory '/usr/ports/www/firefox/work/.build'
*** Error code 1