1205975 - Switching tabs sometimes shows the page contents from a different tab (but with the expected tab's title)

Status: RESOLVED WONTFIX

(Firefox for iOS :: General, defect)

Description

[Chris Peterson [:cpeterson]]

When switching between tabs in the tab switcher, Firefox sometimes shows me the page contents from the tab one to the left of the selected tab (but with the selected tab's title). Switching to another tab and back will usually show the expected page contents.

I don't have consistent STR, but it seems to happen more frequently when I have 5+ tabs open and maybe when selecting the right-most tabs in a tab row. I usually use my iPhone in landscape orientation, in case the number of tabs in the row might affect this bug.

Comment 1

[Stephan Leroux [:sleroux]]

:cpeterson, which version of the app are you running? You can find out from the settings page inside the app near the bottom.

Comment 2

[Chris Peterson [:cpeterson]]

(In reply to Stephan Leroux [:sleroux] from comment #1)
> :cpeterson, which version of the app are you running? You can find out from
> the settings page inside the app near the bottom.

I was using some build of version 1.0. I can't confirm my exact version because Firefox crashes on startup since I upgraded to iOS 9.

Comment 3

[Richard Newman [:rnewman]]

Could you update to the latest version and see if this still happens? You're several months behind.

Comment 4

[Chris Peterson [:cpeterson]]

Attachment: 1-tabs.png

I reproduced this problem today with version v1.1 (1103). Here is a screenshot of my tab screen right before I saw the problem.

Comment 5

[Chris Peterson [:cpeterson]]

Attachment: 2-tab.png

And when I select the "ZDNet Google and Microsoft…" tab in the lower right of the tab screen, the Hacker News page and URL is opened.

It was not a transitory problem. Once the problem happened, I could keep reproducing it by switching back to the tab screen and selecting the ZDNet tab again.

Comment 6

[Stephan Leroux [:sleroux]]

Hey Chris,

In your example, did you open the zdnet tab by long pressing -> open in new tab? Do you find that this issue occurs when you open tabs in this manner or are you able to reproduce it with tabs created from the tab tray?

Comment 7

[Chris Peterson [:cpeterson]]

I think I only see this issue when long pressing links and opening new tabs in the background. My typical browsing behavior is to open Hacker News or Google News and then open 5–10 links into background tabs to read later.

Comment 8

[C]

Not sure if this is helpful but I am experiencing this on FF 1.4, iOS 9.2 on an iPhone 5S.

Similarly to Chris Peterson I browse sites like hacker news open several tabs with a long press and then go back and read them. I haven't identified exactly what causes it but seems to happen when closing a tab and then selecting an already open tab. It's almost like a list has become out of sync with the currently open tabs presented in the UI.

Comment 9

[Chris Peterson [:cpeterson]]

I still see this bug every day on Fennec version 1.4 (1405). Like C suggested, it seems as if opening multiple new background tabs causes the tab list UI to get out of sync with the actual open tabs.

Comment 10

[Richard Newman [:rnewman]]

Still seeing this on master (2.0).

Approximate steps:

1. Open In New Tab on a bunch of links.
2. Hit the tabs tray button. Observe that one page hasn't loaded. Don't pick that one.
3. Pick a page.
4. The page that hadn't loaded loads instead.

Or perhaps:

1. Open In New Tab as above.
2. Tap a link directly.
3. Switch tabs. Observe that the tapped link loads instead.

Comment 11

[Brian Nicholson (:bnicholson)]

Attachment: rnewman_tabs.mp4

Attaching a video rnewman sent over IRC. Interestingly, the wrong tab seems "stuck" even after re-selecting it multiple times in the tabs tray. In this case at least, the browser only fixes itself after switching to another tab, then back.

Comment 12

[C]

I had this work happen to a private tab too.
Reading HN pressing and holding to open link in new tab. Accidentally clicked private tab. Reading through all the links I had opened and when I clicked on one page in tab view it jumped into private mode and showed me that page. Jumping back to tab view showed I was in 'normal' mode however selecting the tab again jumped me into the private tab.

Comment 13

[Brian Nicholson (:bnicholson)]

Haven't had any luck reproducing this, and we're about to go to 3.0, so bumping this to 4.0.

Comment 14

[Chris Peterson [:cpeterson]]

I still see this problem every day with 4.0.0 (1).

Comment 15

[Brian Nicholson (:bnicholson)]

Frustrating -- we've had a lot of trouble reproducing this. Chris, are there any particular usage patterns you've noticed when this happens? Do you see this shortly after opening new tabs in the background? Do you know if you removed tabs recently, or if the app recently resumed from the background, etc?

Comment 16

[Chris Peterson [:cpeterson]]

The simple STR in comment 0 worked for me very reliably. The good news, however, is that I haven't been able to repro today with the new 4.0.0 (3) build. :) I'll keep testing.

Comment 17

[Stephan Leroux [:sleroux]]

WONTFIX for now. If we can reproduce, we can reopen.