You can download Zotero on the Zotero download page. Note whether you are installing on a Mac, Windows, or Linux. Be sure to also install a Zotero Connector for your web browser.
Open the .dmg you downloaded and drag Zotero to the Applications folder. You can then run Zotero from Spotlight, Launchpad, or the Applications folder and add it to your Dock like any other program.
After installing Zotero, you can eject and delete the .dmg file.
Run the setup program you downloaded.
Download the tarball, extract the contents and run zotero from that directory to start Zotero.
Chromebook
To set up Zotero on a Chromebook, see Installing on a Chromebook.
Integration with Google Docs
Hot to add a Zotero toolbar and menu to the Google Docs interface:
Zotero Google Docs integration
Zotero should update itself automatically by default, or you can go to the Help menu and select “Check for Updates” to check for updates manually. You can also always manually install a new version of Zotero over your existing version without losing any data.
If you're currently running Zotero 4.0 for Firefox and wish to upgrade to Zotero 5.0, you'll need to install Zotero 5.0 from the download page along with the new Zotero Connector for Firefox. See A Unified Zotero Experience for more information.
