Safari

• Bookmarklet - clip url and selection

• Bookmarklet - clip code

• Bookmarklet - clip blockquote

pin needed tabs
open new Safari window
unpin tabs
In order to make it simpler to use from keyboard one can define shortcut to toggle pinning i.e. two operations with same shortcut: System Preferences > Keyboard > Shortcuts > App shortcuts, app Safari, one for 'Pin Tab' and another for 'Unpin Tab', assign same keyboard shortcut (for example ⌥⌘P).

Possible workflow from keyboard:

navigate between Safari tabs using ⌃⇥ (Control-Tab)
pin needed tabs with keyboard shortcut (for example ⌥⌘P),
when all needed tabs are pinned open new Safari window with ⌘N,
go through all pinned tabs using ⌃⇥ and unpin them using shortcut.

Select Bookmarks > Add Tabs for These X Bookmarks.
In the dialog that appears, name the folder that will contain these bookmarks and click Add.
Open a new window by selecting File > New Window.
Choose Bookmarks > Show Bookmarks.
In the folder with full of books for those tabs, remove the bookmarks for items you don’t want to appear in the new window.
Right-click on the bookmarks folder and select Open in New Tabs.
Return to the window you started with and click the x close button on each tab you don’t want.