Going back in history ends up with wrong tab title

[jstrot]

• Go to a website, rename using "Set for this tab" with a title like "NEW - $0". Title is now "NEW - original"
• Follow a link in the tab. Title is now "NEW - link1".
• Press the back button. Title is now "NEW - NEW - original" !!
• Refreshing the page properly restores the expected "NEW - original" title

[Lazyuki]

Hm yeah this is sort of expected, since when going back the browser usually caches the title name (as part of the HTML) but to the add-on it looks like a new tab name. I'm not sure how I'd go about fixing this