Here are my Opera settings. See also: Browser Settings, Browser Add-On Settings, Programs, Operating Systems.
Introduction
Plugins info: about:plugins
Search bar
Right-click search bar and remove it.
Tools: Appearance
Skin
[ ] Enable special effects
Panels
[ ] Search
[x] Bookmarks
[ ] Contacts
[ ] Unite
[ ] Chat
[ ] Notes
[ ] Downloads
[x] History
[ ] Links
[ ] Windows
[ ] Info
[ ] Widgets
Toolbars
[ ] Main Bar
[ ] Bookmarks Bar
[x] Tab Bar
[ ] Status Bar
[x] Address Bar
[ ] View Bar
[ ] Navigation Bar
[ ] Start Bar
Progress Bar: [Simple]
Opera: Preferences
General
Startup: [Start with home page]
Pop-ups: [Block all pop-ups]
Forms
[ ] Enable Password Manager
Webpages
Opera Turbo: [Off]
Advanced
Tabs
When cycling through tabs with '\'' + Tab: [Cycle in recently used order]
[ ] Show thumbnails in tab cycle (I don't need thumbnails)
When closing a tab: [Activate the next tab]
[ ] Reuse current tab
[ ] Open new tab next to active (I prefer to the end of all tabs)
[ ] Show thumbnails when hovering tabs
[ ] Enable thumbnails in tabs
[Additional tab options...]
[ ] Show close button on each tab (not needed, I use double-click to close tabs)
[ ] Open windows instead of tabs
[x] Double-click to Close Tab (faster than looking for the close button for multiple tabs)
Browsing
[ ] Show tooltips
[ ] Confirm exit
[x] Show full web address in address field
[ ] Check spelling
Notifications
[ ] Enable program sounds
[ ] Show notification for new messages
[ ] Show notification for blocked pop-ups
[x] Show notification for finished downloads
[ ] Show notification for Opera Unite applications
History
Addresses: [1000]
Memory cache: [400 MB] (Mac Pro runs out of memory with "Automatic" setting)
Disk cache: [400 MB] (because there are memory problems with Mac OS X, I use maximum amount of disk cache)
Tools: Advanced: Plug-Ins
(Comments: a single plugin may slow down browsing considerably. D is for disabled: Adobe Acrobat (not needed). DivX (not used). iPhotoPhotocast (not needed). Java (not needed except for bank). Picasa (not needed). Windows Live Photo Gallery (part of Windows Live Essentials).)
(Comments: Java is a security issue especially with OS X, so disable it except when using my bank website.)
(Comments: check disabled plug-ins after Opera update, because all plug-ins were enabled after update from Opera 11 to Opera 12 on OS X Lion.)
[D] Adobe Acrobat 10.1.3.23 (Windows 7)
[ ] DivX Plus Web Player 2.2 (speed up videos by utilizing your graphics card, so CPU doesn't do all the work) (OS X 10.7)
[ ] DivX VOD Helper Plug-in 1.1 (Video on Demand, DivX's version of digital rights management or DRM) (OS X 10.7)
[ ] Flip4Mac Windows Media Plugin 2.3.4 (OS X 10.7)
[ ] Google Earth Browser Plugin 6.0 (OS X 10.7)
[ ] Google Talk NPAPI Plugin 2.8.7.6830 (OS X 10.7)
[ ] Google Talk Plugin 2.8.5.6620 (Windows 7)
[ ] Google Talk Plugin Video Accelerator 0.1.44.15 (OS X 10.7)
[ ] Google Talk Plugin Video Accelerator 0.1.44.15 (Windows 7)
[ ] Google Update 1.3.21.111 (Windows 7)
[D] iPhotoPhotocast 7.0 (OS X 10.7)
[ ] iTunes Application Detector 1.0.1.1 (Windows 7)
[D] Java Applet Plug-in 14.2.0 (OS X 10.7)
[D] Java(TM) Platform SE 6 U31 6.0.310.5 (Windows 7)
[ ] npFFApi 1.0.0.1 (Windows 7: ZoneAlarm)
[D] Picasa 1.0 (OS X 10.7)
[D] Picasa 3.1.0.0 (Windows 7)
[ ] QuickTime Plug-in 7.7.1 (OS X 10.7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin2.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin3.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin4.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin5.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin6.dll (Windows 7)
[ ] QuickTime Plug-in 7.7.1: npqtplugin7.dll (Windows 7)
[ ] Shockwave Flash 11.2.202.228 (OS X 10.7)
[ ] Shockwave for Director 11.6.1r629 (view interactive web content created by the Macromedia Director) (OS X 10.7)
[ ] Shockwave for Director 11.6.4r634 (Windows 7)
[ ] Silverlight Plug-In 5.0.61118.0 (OS X 10.7)
[ ] Silverlight Plug-In 5.0.61118.0 (Windows 7)
[D] Windows Live Photo Gallery 15.4.3538.0513 (Windows 7)
Last modified: May 18th, 2013
Author: Tomi Häsä (tomi.hasa@gmail.com)
URL: http://sites.google.com/site/tomihasa/opera-settings