I have used Menu > Preferences > Customize Look and Feel > Font and set "Enable anti-aliasing" and "Enable hinting" to off. This makes most or all of the bundled Lubuntu apps stop using anti-aliasing, but it does nothing for Firefox (50.0.2, i686).
I have also used Firefox about:config to set
rendering.graphite.enabled - false
I have further disabled all SVG and web fonts in Firefox:
gfx.downloadable_fonts.enabled - false gfx.font_rendering.graphite.enabled - false gfx.font_rendering.opentype_svg.enabled - false
Still, fonts seem to be anti-aliased exactly as before in Firefox. I think the sub-pixel stuff is gone though.
What I would ultimately prefer is to have bitmap fonts (for every program) because I find that my eyes strain much faster with anti-aliasing. However, I'll settle for completely disabling anti-aliasing and hinting.
I tried using lynx and similar text mode browsers in the console, but I find that I need Firefox.
Do you guys know how to solve this?
I would also like to say that I just switched to Lubuntu from Windows and so far I have been very impressed! The transition was completely painless, which is not how things were a couple of years ago when I tried some other Linuxes.