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CleanURLs breaks the History API #311
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This is a kind of duplicate of #196. Now that I look into it, it seems my PR there was written too hastily, instead of:
code: 'history.replaceState({state: null},"",'+JSON.stringify(urlAfter)+');'
it should have been:
code: 'history.replaceState(null,"",'+JSON.stringify(urlAfter)+');'However, maybe we should reconsider the second solution suggested in that thread:
do not clean history if the hostname stays the same -- we could probably accept that inside one hostname it's acceptable that websites use the history information.
Hi. Is this still an issue?
Yep
- added sub-issues
on Jul 30, 2026
I noticed this bug while working on my website.
If you do
and then press the back button, normally the
window.onpopstatefunction gets called with an event, and you can get the state (first parameter in the code above) with event.state and you can get the value ofsomethingfrom there.When CleanURLs is enabled, however, that original value is lost and I just get a generic state without the information needed to actually go back to the previous state in my code.
I don't know if this is intentional or not but I imagine it breaks virtually every site using that API.
I forgot to mention: I'm using Librewolf, a Firefox-based browser.