Bug 151702 – Content Blocker does not apply "css-display-none" rules when page is loaded in non-active tab

• Status: RESOLVED
• Resolution: INVALID
• Component: WebKit Misc.

[Andrey Meshkov]

Steps to reproduce (tested on ipad mini 2):

1. Register a simple content blocker with one rule (hiding "share" buttons on macrumors.com)
[{trigger: {url-filter: ".*", resource-type: ["document"], if-domain: ["*macrumors.com"]}, action: {type: "css-display-none", selector: ".social"}}]
2. Open macrumors.com. Share buttons are hidden http://screencast.com/t/88mfI2UM
3. Tap on the article header and select "Open in New Tab"
4. Wait a bit then switch to that new tab

Expected result:
Share buttons should be hidden

Real result:
Share buttons block is visible
The block will be hidden if you refresh the page

[Andrey Meshkov]

The issue is still there.

Here's an easier way to reproduce:

1. Register a simple content blocker with one rule (hiding "share" buttons on macrumors.com)
[{trigger: {url-filter: ".*", if-domain: ["*iana.org"]}, action: {type: "css-display-none", selector: "body"}}]
2. Open example.org
3. Cmd+Click on the "More information..." link
4. Wait a bit then switch to the IANA tab


Expected result:
The page content is hidden

Actual result:
Nothing is hidden, you need to refresh the page for the rules to be applied

[Maciej Stachowiak]

Strange that opening in a background tab would have an effect.

[Andrey Meshkov]

Huh, it seems that this issue is invalid after all.

Most likely I've not waited enough for a content blocker to be compiled and applied.