[firefox] open a new website in an existing tab causes website to break

[harshanvn]

Steps To Reproduce

1. Configure uBlock in Default Deny and block 3P script & IFrame
2. Open any website in a new tab (say github.com)
3. In the same tab, now goto wilderssecurity.com

You will see wilderssecurity.com completely broken..

Here is the uBlock popup snapshot -

uBlock v0.9.2.4 - dev4
W8.1 64 bit - FF v37 32 bit

[gorhill]

Could not reproduce:

FF36 though, FF37 is not out for my OS.

[gorhill]

When you say

now goto wilderssecurity.com

How? Entering the address manually, link, bookmark...?

[Betsy25]

I had the same problem as @harshanvn when I drag&drop installed the latest .xpi (self compiled), it looks like a browser restart got rid of the problem & never experienced it again. (The count badge also showed huge blocking numbers 500+ and more.)
When I had, say, majorgeeks.com open, the popup showed the majorgeeks related items, when i then clicked another bookmark to open in that same tab, the content of the tab got broken, and the popup showed items of both majorgeeks and the newly opened site.
Looks like some code must have mangled using the restartless update method which required a browser restart to fix it permanently.

FF 40(nightly), Win7, one of the latest commits.

[gorhill]

@Betsy25 Maybe related to the code changes in b053f1e related to the listening of tab content change events. I do sometimes experience quirks after I try to update the package, so I've taken the habit now to remove uBlock, quit/restart Firefox, and drag-n-drop, it's more reliable I found.

[Betsy25]

@gorhill I honestly don't know anymore what the latest commit was, I'll try keeping the same update procedure and see if the misbehavior occurs again. Wouldn't mind myself if updating requires a browser restart, but i'll just try to see if it continues with newer commits.

[harshanvn]

@gorhill I am no longer able to reproduce the issue, after i restart by browser.

However, i did screen record the issue, before i restarted it. So, you can see the problem :)

[Betsy25]

@harshanvn Yep, that's how sites looked here too. I just drag&drop installed the latest commit and couldn't reproduce anymore. That's good.

[gorhill]

@harshanvn Ok, that's how I tried to reproduce, by typing the address in the address bar.

I suspect some changes sometimes require a browser restart, and for the commit mentioned above there were changes about using a new API for tab change events.

[harshanvn]

Ok Thanks. That sounds reasonable.

Strange thing (unrelated to this bug i think..), when you try open above give gif link directly...it open fine. However if i try to do ctrl-f5 to reload the page, it will not reload...

https://cloud.githubusercontent.com/assets/779630/6927159/14c1b692-d809-11e4-900e-2893cb1c10f5.gif

Does it work fine for you in firefox..

[harshanvn]

Strange thing (unrelated to this bug i think..), when you try open above give gif link directly...it open fine. However if i try to do ctrl-f5 to reload the page, it will not reload...

https://cloud.githubusercontent.com/assets/779630/6927159/14c1b692-d809-11e4-900e-2893cb1c10f5.gif

Does it work fine for you in firefox..

Please ignore this. Looks like a firefox thing. Able to reproduce the issue even if ublock has been disabled. Maybe sth to do with v37 release...

[Betsy25]

https://cloud.githubusercontent.com/assets/779630/6927159/14c1b692-d809-11e4-900e-2893cb1c10f5.gif is unreachable at the moment for me.

[harshanvn]

you restart your browser and open the link. it will work fine for the first time and then the issue repeats from second reload onwards...