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private-browsing isn't passed to QtWebKit without restart #1742

The-Compiler opened this Issue Aug 2, 2016 · 1 comment


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The-Compiler commented Aug 2, 2016

I just found out that due to a bug introduced in v0.2.0, qutebrowser doesn't tell QtWebKit to turn private browsing on when doing :set general private-browsing true.... 馃槰

Note this only applies to the running instance - on a fresh start with private-browsing in the config, the right thing happens.

I'm currently working on a fix and will release v0.8.2 today or tomorrow with it in. I'm still trying to find out what is impacted exactly. What I found out so far:


  • cache: Not affected
  • cookies: Not affected
  • history: Not affected

html5 local storage

  • Websites can set local storage values with private browsing
  • The values get stored on disk (see ~/.local/share/qutebrowser/{local,offline}-storage)
  • After restarting, the new private session (with private browsing on correctly) can't read the values
  • Without private browsing, the values can be read (by the same website)

Other concerns

  • QtWebKit passes a private browsing setting to NPAPI plugins (like Flash). Not sure what happens with the setting after that.
  • QtWebKit has some more code to handle private browsing (e.g. for javascript console logging?) though that should be minor.

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The-Compiler Aug 2, 2016


Fixed in f73f3a2, keeping this open until the release.


The-Compiler commented Aug 2, 2016

Fixed in f73f3a2, keeping this open until the release.

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