The real solution is upgrading to Safari 13, but there does exist a solution on Safari 12 and earlier.
Open Safari Preferences, choose the General tab, and for the download location choose ‘ask for each download’.
With this option select, Safari will prompt for a file name and a location to save the file, which you can cancel so the download doesn't take ...
Command + Comma (,) on Safari opens Preferences, as shown here:
To remap it, go to System Preferences » Keyboard » Shortcuts » App Shortcuts… and click the + button:
Then set the app as "Safari" and "Preferences…" as the item you want to add a new keyboard shortcut for, like so:
I chose Command+Option+Control+P but you can choose ...
Try to go in Safari Settings > Advanced > Enable "Show developer menu".
In the developer menu enable "VP9 SW decoder" and "VP9 SW decoder on battery".
Apparently, some older Mac doesn't support 4k on Youtube, you can still try to play them with Google Chrome.
It is possible to somewhat replicate the functionality with workaround but this can be considered as a clumsy and non-intuitive way.
It takes advantage on pinning pages. In general terms:
pin needed tabs
open new Safari window
In order to make it simpler to use from keyboard one can define shortcut to toggle pinning i.e. two operations with same ...
There are several ways you could do it. But first, if Safari is your default browser, then you can just use this to open the URL:
open <url> => open http://www.google.com (Remember to specify the protocol!) and this will open the URL in Safari (default browser)
Otherwise you can be more specific like:
And to open a ...
The Cookies section is what you're looking for in the Developer Tools. Inspect it for this site, Stack Exchange, and you'll see a number of cookies and their values.
Inspect Element > Storage > Cookies
The shortcut in Safari for Responsive Design Mode is controlcommandR (not shift).
To activate this mode, you'll also need to make sure you have enabled the Develop menu. If you haven't, you can activate it by clicking on the Safari menu in the menu bar, then clicking Preferences, and under the Advanced tab enabling "Show Develop menu in menu bar."
Don't think there is an option with Safari. However, I've used an app called Fluid that can create websites into standalone apps. It is free, but there's extra minor features available for a small fee. Have a look at it here: https://fluidapp.com
Open safari and press ⌘Y, then press ⌘A, right click (Or control click) and select delete.
If you just want to delete some, then ⌘Click the days or sites you want to delete and then right click (Or control click) and select delete.
Last Pass Help recommends installing version 4.6 for macOS Big Sur from their direct download site instead of the app store version.
If you're still having issues, Last Pass support forum recommends uninstalling the app, the safari extension, emptying trash and rebooting your mac and then reinstalling from their direct download site.