Safari Tabs like Firefox / Chrome

"Disclaimer

Actually, there is generic answer from @donut -- thanks for this contribution! However, it wasn't clear from me when I met it. Thus, let me to concrete it exactly for Command + Option + Left/Right as it was asked initially.

Solution for using Command + Option + Left/Right in Safari

Go to System Preferences > Keyboard > Keyboard Shortcuts > App Shortcuts
Click ""+"" button
Chose Safari within Application list
Type Show Next Tab for Menu Title
For Keyboard Shortcut press Command + Option + Right
Do the same for Show Previous Tab

Solution for using Command + 1, 2, 3... in Safari

Go to menu Safari > Preferences > Tabs
Check option Use ⌘-1 through ⌘-9 to switch tabs"

"Just as reference, and as a half-answer, following I'll summarize the options I've found. They came from two similar approaches, one from justinblanton.com and another from pugio.net.

Summing up, they both use FastScripts and this applescript:

try
tell front window of application ""Safari"" to set current tab to tab 1
on error
tell front window of application ""Safari"" to set current tab to last tab
end try

You'd have to save 9 files of this in ~/Library/Scripts/Applications/Safari, and give them all shortcuts in FastScript.

In my case, the 9th one in my case have just the ""last tab"" 1 line and no ""try"", and I got the SafariTabs.zip file from pugio and put it on root scripts, in /Library/Scripts/Applications, rather than generating them and putting under Users.

To re-enforce: I don't like this answer because it uses third-party backgrounded application. I wish a way to tweak my system, could be using the same application, but not needing more stuff running on my machine in the background."