Fix locating jabref in jabrefHost.py

shutil.which() returns an str and not a pathlib.Path. Therefore, we need
to check if which() actually returns something and if so, we should
convert it to a pathlib.Path such that JABREF_PATH is always of the same
type.

Also, try locating JabRef in addition to jabref in the user's PATH.

CHANGELOG.md

@@ -44,6 +44,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where no longer a warning was displayed when inserting references into LibreOffice with an invalid "ReferenceParagraphFormat". [#6907](https://github.com/JabRef/jabref/pull/60907).
 - We fixed an issue where a selected field was not removed after the first click in the custom entry types dialog [#6934](https://github.com/JabRef/jabref/issues/6934)
 - We fixed an issue where a remove icon was shown for standard entry types in the custom entry types dialog [6906](https://github.com/JabRef/jabref/issues/6906)
+- We fixed an issue with the python script used by browser plugins that failed to locate JabRef if not installed in its default location.
 
 ### Removed
 

buildres/linux/jabrefHost.py

@@ -19,10 +19,12 @@
 JABREF_PATH = script_dir / "bin/JabRef"
 if not JABREF_PATH.exists():
     JABREF_PATH = shutil.which("jabref")
-
-if not JABREF_PATH.exists():
-    logging.error("Could not determine JABREF_PATH")
-    sys.exit(-1)
+    if not JABREF_PATH:
+	    JABREF_PATH = shutil.which("JabRef")
+	    if not JABREF_PATH:
+		logging.error("Could not determine JABREF_PATH")
+		sys.exit(-1)
+    JABREF_PATH = Path(JABREF_PATH)
 
 logging_dir = Path.home() / ".mozilla/native-messaging-hosts/"
 if not logging_dir.exists():