I’m using Win 10 Edge In the title bar there is no “Bookmark”, so how do I bookmark a page? I finally found the page the lack of which keeps me from using LibreOffice.
Edge is a Browser by Microsoft based on Google-Chrome.
You may consider LibreOffice as replacement for MS-Office, but not for the browser. (It can edit html, but I wouldn’t consider this a key feature.)
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Why you used the tag Calc (the counterpart of Excel on MS-side) eludes me. Are you searching a “bookmark”-feature for Calc/Excel?