Some websites offer bibliographic data in machinereadable format. e.g. a Bibtex oder RIS text. But there is no download link. The text is just displayed so you can copy and paste it.

JabRef should be able to read from clipboard e.g. the content of a RIS file.

TY  - BOOK
ED  - Kempf, Ute
ED  - Wrede, Birgitta
ID  - 2912032
SN  - ISBN 978-3-932869-19-8
TI  - Gender-Effekte. Wie Frauen die Technik von morgen gestalten
VL  - Band 19
ER  - 

This would prevent me to open a text editor, paste the text in there, store it as a RIS file, reopen it with jabref, ... ;)