PS
I should have mentioned that is the profile directory and the path can be found at Menu|About Opera.

"will I lose all my settings etc"

No.

But be safe and backup "/home/rudi/.config/opera"(replace rudi with your directory) then in the event of a mishap simply replace that directory with your backup.

PS
Now I just need a 'reload' in the Tab Label right click context menu and I will have the perfect browser.

Honestly, sometimes I could just kick myself.

Was trying to download from the above suggested sites and having problems downloading and installing deb packages.

Anyhoo, for some reason I decided to clean out the Downloads folder and lo and behold there was the

'opera-stable_42.0.2393.517_amd64.deb' package from when I originally installed Opera.

So after uninstalling Opera 43 and reinstalling 'opera-stable_42.0.2393.517_amd64.deb' everything works, nothing else required.

I like to apologize to jgffopera for taking over his post but hopefully it has helped him. I will be book marking this post for future reference that's for sure.

Thank you all.

tyrion-ua, Thank ya, thank ya, thank ya. I have searched hi and low. Fngers crossed, I hope it works.
Will report when done.

Hi denisftw,
Twitter supports the MP4 video format with H264 format with AAC audio.
Twitter vtdeos do NOT play.

Youtube supports
• MP4 (a multimedia container format standard specified as a part of MPEG-4)
• FLV (Flash Video, a kind of video format )
• AVI (Audio Video Interleaved,a kind of video format)
• MOV (the QuickTime multimedia file format)
• 3GP (a multimedia container format defined by the Third Generation Partnership Project for 3G UMTS multimedia services.)
• MKV (an free container format that holds an unlimited number of video, audio, picture, or subtitle tracks in one file)
• MPEG (the Moving Picture Experts Group, a kind of video format)
• WMV (Windows Media Video)
• SWF (Shockwave Flash)

I have NO problems with Youtube.

As I said, all was good on Opera 42, I would love to downgrade to it, but cannot find a download for it.

Thanks for the info zbi1981,
That website shows Opera 37 supporting H.264 and Opera 42 worked fine as well.
Do you know how to downgrade to an earlier version, if it's possible?

Same problem here.
Linux Mint 18.1 Cinnamon 64 bit
Opera 43.

Worked fine on Opera 42.
Does anyone know how/where to download Opera 42?
Thanks.