Upgrade Storageallow "extra" to be searched using "is greater than"
When I add a new paper to my library I'd like to record how many citations it has on Google Scholar. Seems that I can do that using the "extra" field. But say I'd like to find just those articles with a large number of citations. I have no ability to search "extra" "is greater than" (say) "300". Zotero only gives me the "is", "is not", "contains", and "does not contain" options.