There is a known issue that causes an error message to appear in Firefox when you try to sync your bookmarks on an iPhone, iPad or iPod touch to another device. A fix is coming and in the meantime, you can fix the issue by forcing a sync without bookmarks, then resyncing again with bookmarks.
Here's how to do this step by step:
- Open Firefox on your desktop or laptop computer.
- Click the menu button to open the menu panel.
- In the menu panel, click on your email address. (You might have to sign in to Sync first.) This will open the Sync preferences page.
- Remove the checkmark next to Bookmarks in the Sync across all devices section.
- Click the menu button to open the menu panel.
- Click the Sync button in the menu panel.
- Click your email address again to return to the Sync preferences page.
- Put the checkmark back next to Bookmarks.
- Click the menu button, then click the Sync button in the menu panel again.
The error message in Firefox for iOS should disappear as it re-syncs your bookmarks.
Sync is unavailable error message: If you see a Sync is unavailable error after performing the preceding steps, log out of Sync on your iPhone or iPad, then log back in:
- Tap the menu button at the bottom of the screen, followed by .
- Scroll down to the bottom of the screen and tap Log Out.
- Scroll up and tap Sign in to Firefox. Follow the steps to sign in.