Opera URLs LISTE
List of Opera URLs

opera://about
opera://accessibility
opera://activity
opera://autofill-internals
opera://blob-internals
opera://bookmarks
opera://components
opera://conflicts
opera://conversion-internals
opera://crashes
opera://discards
opera://downloads
opera://easy-setup
opera://extensions
opera://favicon
opera://flags
opera://gcm-internals
opera://gpu
opera://help
opera://histograms
opera://history
opera://indexeddb-internals
opera://inspect
opera://interstitials
opera://invalidations
opera://local-state
opera://media-engagement
opera://media-internals
opera://net-export
opera://net-internals
opera://network-errors
opera://news
opera://newtab
opera://pinboards
opera://player-service
opera://predictors
opera://prefs-internals
opera://print
opera://process-internals
opera://sandbox
opera://serviceworker-internals
opera://settings
opera://sidebar-setup
opera://site-engagement
opera://startpage
opera://sync-internals
opera://system
opera://tracing
opera://ukm
opera://update
opera://usb-internals
opera://webrtc-internals

For Debug
The following pages are for debugging purposes only. Because they crash or hang the renderer, they're not linked directly; you can type them into the address bar if you need them.

opera://badcastcrash/
opera://crash/
opera://crashdump/
opera://kill/
opera://hang/
opera://shorthang/
opera://gpuclean/
opera://gpucrash/
opera://gpuhang/
opera://memory-exhaust/
opera://heapcorruptioncrash/
opera://quit/
opera://restart/

Permalinks to Sections in Settings

opera://settings/opera-gx
opera://settings/side-profiles-settings
opera://settings/theme-settings
opera://settings/gx_lights_settings
opera://settings/sounds_settings
opera://settings/background_music_settings
opera://settings/gxc_settings
opera://settings/early_bird
opera://settings/privacyProtection
opera://settings/adBlockerExceptions
opera://settings/adBlockerLists
opera://settings/trackerBlockerExceptions
opera://settings/trackerBlockerLists
opera://settings/wallpapers
opera://settings/privacy
opera://settings/clearBrowserData
opera://settings/cookies
opera://settings/siteData
opera://settings/security
opera://settings/securityKeys/phones
opera://settings/content
opera://settings/content/location
opera://settings/content/camera
opera://settings/content/microphone
opera://settings/content/notifications
opera://settings/content/backgroundSync
opera://settings/content/sensors
opera://settings/content/automaticDownloads
opera://settings/handlers
opera://settings/content/midiDevices
opera://settings/content/usbDevices
opera://settings/content/serialPorts
opera://settings/content/filesystem
opera://settings/content/hidDevices
opera://settings/content/clipboard
opera://settings/content/paymentHandler
opera://settings/content/ar
opera://settings/content/vr
opera://settings/content/idleDetection
opera://settings/content/windowPlacement
opera://settings/content/fontAccess
opera://settings/cookies
opera://settings/content/javascript
opera://settings/content/images
opera://settings/content/popups
opera://settings/content/sound
opera://settings/content/zoomLevels
opera://settings/content/pdfDocuments
opera://settings/content/protectedContent
opera://settings/content/insecureContent
opera://settings/content/forceDarkMode (Hidden in settings, but shown as a "Configuration" link in the Easy-Setup button menu in Opera GX)
opera://settings/appearance
opera://settings/fonts
opera://settings/sidebar
opera://settings/manageSidebar
opera://settings/people
opera://settings/importData
opera://settings/search
opera://settings/searchEngines
opera://settings/defaultBrowser
opera://settings/onStartup
opera://settings/appsNavigation
opera://settings/autofill
opera://settings/passwords
opera://settings/payments
opera://settings/addresses
opera://settings/webrtc
opera://settings/vpn
opera://settings/vpnBypassRules
opera://settings/vpnPro
opera://settings/enhancedAddressBar
opera://settings/ipfs
opera://settings/batterySaver
opera://settings/playerService
opera://settings/easyShare
opera://settings/cryptoWallet
opera://settings/pinboards
opera://settings/searchPopup
opera://settings/videoConferencePopout
opera://settings/videoPopout
opera://settings/personalNews
opera://settings/startPage
opera://settings/userInterface
opera://settings/languages
opera://settings/editDictionary
opera://settings/downloads
opera://settings/a11y (not working at the moment)
opera://settings/system
opera://settings/shortcuts
opera://settings/keyboardShortcuts
opera://settings/reset
opera://settings/resetProfileSettings

Source:
https://www.reddit.com/r/operabrowser/wiki/opera/opera_urls/

And:
Where can i find a list of all Opera Browser features per URL address bar like:

opera://inspect/
opera://about/
opera:config
opera://settings/
opera://flags

Thx

In Chromium based browsers, as far as I know, files are saved using the file format determined by its mime/type.

This doesn't have the details I'm looking for. These are basic settings. I looked there before getting into the forums. In Firefox about:config will open a page of very detailed settings for FF operation, which will screw the browser up if you don't know what you're doing. Maybe this is in Opera's developer mode, but it didn't look like it from what I saw.

In Firefox, it's a function of the browser. I imagine it's the same in all bowsers, because it's the browsers that made the switch in format type, not the websites, based on what I've read.

Thanks anyway.

Regarding the setting you mentioned, there isn't anything like that in chromium, images are saved in the format the site say they are.