Zotero 5.0 and old Zotero folder
1) Can the old Zotero folder within in the Firefox profile be deleted once the installation of Zotero 5.0 has been completed or is it preferable to change the path of the data directory in Zotero 5.0 to the former location of v. 4.0?
2) In v. 4.0 it was possible to import data from the KVK-metacatalog (https://kvk.bibliothek.kit.edu/index.html?lang=en) to the Zotero-libraries. With the new Zotero Connector this does not work any more in v. 5.0.
2) In v. 4.0 it was possible to import data from the KVK-metacatalog (https://kvk.bibliothek.kit.edu/index.html?lang=en) to the Zotero-libraries. With the new Zotero Connector this does not work any more in v. 5.0.
2) KVK doesn't work in 4.0 for me and I'm not sure how it ever could have worked given that the results it displays are all basically just links to other catalogs (most of which, but not all, are supported). Are you sure this worked in the past? Did search results look the same?
The only time there should be a directory left in one of the profile directories is if 1) Zotero wasn't able to migrate the directory, in which case it'd still be using it or 2) you had two separate data directories (from saying "No" when a previous version of Zotero asked you whether you wanted to share directories between Zotero for Firefox and Zotero Standalone) and it migrated only one of them. (The latest version of Zotero does a better job of choosing the more recent database in that situation.)
I have to clarify my query about KVK:
When you click on one of the KVK-search results, the record of the selected library catalog appears as subordinate link (e.g. http://kvk.bibliothek.kit.edu/view-title/index.php?katalog=DDB&url=http://portal.dnb.de/opac.htm......), i.e. as frame within the KVK-website. In v. 4.0 this subordinate link was correctly recognised as importable item, while in v. 5.0 it is only identified as "Web Page with Snapshot".
Note that this only applies to the German version of the KVK search mask (https://kvk.bibliothek.kit.edu/index.html). In the English version (https://kvk.bibliothek.kit.edu/index.html?lang=en) the selected results are not displayed as frames within the KVK-website.
@adomasven thoughts on how to handle those embedded iframes?