Hi At present, no you cannot do this, but this is something that may be included in the future.

As an alternative, can my homepage be copied to another device via a file?

Do you mean tiles you pinned on the Firefox Home page ? *https://support.mozilla.org/en-US/kb/customize-new-tab-page *https://support.mozilla.org/en-US/kb/hide-or-display-content-new-tab Changes made manually on the about:newtab page are stored in prefs that you can find on the <b>about:config</b> page. *browser.newtabpage.pinned => websites pinned to a tile *browser.newtabpage.blocked => websites removed by clicking the X (Dismiss) button in a tile *https://support.mozilla.org/en-US/kb/about-config-editor-firefox