How to stop my blog and YouTube from crashing frequently ?

Fortunately, Firefox has great crash reporting.  They'll usually tell us exactly what's going on.

In Firefox, please do the following:

• In the address bar, type:
  about:crashes
• You'll see a series of links with long names of random upper-case letters and numbers
• Click the first link
• This tells firefox to submit the crash report
• You'll see a window where the crash report is processing.  Just click back.  You don't need to wait for it.
• The link will change to a lower-case series of letters and numbers, like "bp-something-something"
• Right-click on that link, and choose Copy Link Location
• Paste that link into a reply to this thread.
• Repeat for the first few crashes.

After you've done that, try restarting Firefox with other Add-Ons temporarily disabled.  If it improves the situation, we know where to start looking.  I'm always interested in knowing about new third-party compatibility problems.

To do this, launch Firefox:

Click the Menu icon (3 horizontal bars on the right of the toolbar)

Click the Help icon (the ? icon in the new menu)

Restart with Add-Ons disabled

Thanks!