Here are some screenshots of what you should see with this patched Firefox.
BELOW: On Windows showing the Mechon Mamre text with the Ezra SIL font. The jaggedness
is caused by the fact that "ClearType" is not available for Windows 2000. SBL Hebrew looks
much nicer on Windows 2000, but Ezra SIL should work well on Windows XP. The first
"ha-aretz" is wrong, with the qamets and accent mark on top of each other. In both
respects Internet Explorer is no better on my system.
BELOW: On Linux showing the Mechon-Mamre text with the SBL Hebrew font.