This article applies to the deprecated Zotero for Firefox (pre-Zotero 5.0) plugin. It is not relevant for current versions of Zotero.
If you are missing data in your Zotero 5.0 library, see Data Missing After Zotero 5 Upgrade.
Restoring Zotero after using "Refresh Firefox"
To help you speed up or fix issues with your Firefox installation, Firefox offers the Refresh Firefox option, which creates a new Firefox profile. While generally safe, “Refresh Firefox” can interfere with some Zotero functions. Potential issues depend on your version of Zotero.
Zotero 4.0 for Firefox (deprecated)
Note: These directions will not work with current versions of Firefox. Install Install Zotero 5 and follow these instructions.
If you have used “Refresh Firefox” and lost Zotero for Firefox, follow these steps:
. Don't worry if you find your Zotero library empty at this point.
In the data directory, you should see a zotero.sqlite with a file size of approximately 1 MB, meaning that it's empty. Rename the data directory folder from “zotero” to “zotero-old”.
Locate the “Old Firefox Data” folder on your desktop. This contains your old Firefox data, including your old Zotero data directory. If possible, make a backup of this directory.
Locate the “zotero” folder within the “Old Firefox Data” folder. Copy this folder to your current Zotero data directory location.
When you now open Zotero, you should find your library restored. You can then delete the “zotero-old” directory.