[browser] limit the amount of open tabs restored when browser starts

WebViews are instantiated on demand, when a tab is first activated. So when you start the browser and it restores 30 previously open tabs, it actually instantiates 30 lightweight tabComponent objects which are made up of just a FocusScope, hidden by default.

So I would expect the overhead to be really minimal, if not negligible.

It might still make sense to limit the number of tabs restored (given our data model in which tabs are always ordered by recency, this should be trivial to implement).

Adding an ubuntu-ux task to get design to comment on the idea.

Hi Bill,

Thank you for raising the good point.
We actually designed a feature to limit the amount of displayed tabs to 10, with an action to show 10 more, then 10 more up to 40 tabs.
https://docs.google.com/a/canonical.com/presentation/d/1Qrd4Flfs3EH-fI79IfrYgLdAx2nce-L7ve8NKLCX324/edit#slide=id.g2bb3fbfe6_03
We could implement this feature so every time you restart the browser, only the first 10 are displayed.

I'd rather have that, than removing the tabs altogether from the data model.

I hope it makes sense.

Lowering importance to 'High' as this doesn’t impair significantly the user experience, nor is it a crash.

Until we can implement what Giorgio suggests, let's just limit the list to 10. In the future we can add the buttons for showing 10 more and 10 more after that as specified.

> On Oct 3, 2014, at 4:58 AM, Olivier Tilloy <email address hidden> wrote:
>
> Lowering importance to 'High' as this doesn’t impair significantly the
> user experience, nor is it a crash.
>
> ** Changed in: webbrowser-app
> Importance: Critical => High
>
> ** Changed in: webbrowser-app
> Status: New => Triaged
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1376433
>
> Title:
> limit the amount of open tabs restored when browser starts
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu-ux/+bug/1376433/+subscriptions

+1

Shall I file the feature above as a separate bug?

Yes, please do. Thanks!

This bug was fixed in the package webbrowser-app - 0.23+14.10.20141008-0ubuntu1

---------------
webbrowser-app (0.23+14.10.20141008-0ubuntu1) utopic; urgency=low

  [ CI bot ]
  * Resync trunk

  [ Alexandre Abreu ]
  * Properly setup host support when devtools inspector mode used (LP:
    #1376783)
  * Add pdf mime type support to content hub mapping, (LP: #1374611)

  [ Olivier Tilloy ]
  * Remove the temporary workaround for bug #1328839 as fullscreen
    switching is now fully functional in qtubuntu. (LP: #1328839)
  * Remove an unused import that triggered a (harmless) warning. (LP:
    #1377885)
  * Update application screenshot. (LP: #1377974)
  * Restore only the n most recent tabs at startup, to limit the
    overhead of instantiating too many tab objects. (LP: #1376433)
 -- Ubuntu daily release <email address hidden> Wed, 08 Oct 2014 09:23:52 +0000

I added bug 1379270 to track the see more feature

https://bugs.launchpad.net/ubuntu-ux/+bug/1379270