To create a browser slide show you will need to install xdotool to run the key commands to cycle tab's.
sudo apt-get install xdotool
Once it is installed, create a sh file e.g. slideshow.sh
In the file enter:
DISPLAY=:0.0 xdotool key ctrl+Tab
The “DISPLAY=:0.0” will tell the command to run on the active X session Then the xdotool command is the actual key combo
Once the file is created and saved, you will want to navigate to
/etc/xdg/lxsessions/LXDE then type
sudo nano autostart
Make a new line at the bottom and enter the following:
/usr/bin/screen -dmS slideshow watch -n 15 sh /path/to/slideshow.sh
/usr/bin/screen -dmS slideshow
This creates a GNU screen name “slideshow” that you can attach to to see the command
watch -n 15
This will run the command following every 15 seconds.