Gadget export
To export the oswf-core gadget, click on "Download" button, save the downloaded file, go to Special:Import on the destination wiki and upload it. Then add the following to MediaWiki:Gadgets-definition page:
* oswf-core[ResourceLoader|type=general|dependencies=oojs-ui-core,oojs-ui.styles.icons-movement|hidden]|oswf-core.js
You must have appropriate permissions on the destination wiki (including the right to edit system messages) and import from file uploads must be enabled.