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From one day many of my Joomla sites stop working and get broken. It was happend only in chrome browser. The issue was that chrome was try open my sites trought https protocol even if i dont use any ssl certificate. So if i try open domain in chrome adress bar without www. for example "superjoomla.com" chrome open "https://www.superjoomla.com" and i get security waring. When i wrote exact adress as "http://www.superjoomla.com" my site open but broken because any css or js files dont be loaded.

And it was really strange as it happend at same time on my 2 Mac's.. So i tought it must be server-side issue. But it seems this is Chrome's issue from version Chrome beta 44.0.2403.63. 

We are still waiting for fix from Chrome but meanwhile you can simple fix this issue for any type of cms or website with line of code in your .htaccess file.

Just add "RequestHeader unset HTTPS" and it should works. 

If your joomla vesion or your's extensions are not the latest versions released, you will see a message in your admin panel. In Joomla! 3.4.x it will look like this.

Also you will see the similar message at your control panel after quick links:

If you for any reason don't want to see this messages, you can simply remove/disable them. Just go to Extensions -> Plugin Manager. Then you will see two plugin name as follows:

• Quick Icon - Joomla! Extensions Updates Notification
• Quick Icon - Joomla! Update Notification

Quick Icon - Joomla! Extensions Updates Notification shows the Update extensions you used for the site. Quick Icon - Joomla! Update Notification shows the Update of joomla version. Now either disables both or any one you need.

This way you can turn off joomla cms update notification as you needed.