This may be relevant: https://support.mozilla.org/en-US/kb/add-ons-cause-issues-are-on-blocklist As a last resort you can go to about:config and set extensions.blocklist.enabled to false, then you have to be more aware of what plugins you're running and/or where you're allowing them to run. On 10/13/15 2:59 PM, m.roth at 5-cent.us wrote: > pro alias wrote: >> None of my Centos 5 boxen can show flash since the update this morning. >> Am I alone or do other people have this issue ?? >> Centos 7 boxes work properly. I haven't looked at RHEL 6 boxes yet. >> >> Although I miss using flash on these boxes, it IS a great security >> upgrade.... > Do you have noscript, or something like it? Check firefox, also, I think > it has some protection to turn off flash by default. > > mark