Installing Opera has crippled Firefox and Midori

[Magruder]

After installing Opera (using the .deb from the Opera website, not the package from the Lucid repository), Firefox and Midori now run for less than 5 seconds before crashing.

I re-loaded my frugal install and started over from scratch. (Which isn't a big deal.) Installed Firefox again, installed Opera again... same result.

What can I look at to figure out why the browsers are crashing?

[aarf]

Might need to give the exact version of opera.
Mostly i use the tar.gz will try the deb next time.