Extension error: TypeError: cookies is undefined

[puchu]

Prerequisites

• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
  • I also searched the existing issues at https://github.com/gorhill/uMatrix/issues
• This is not a support issue or a question
  • Support issues and questions are handled at /r/uMatrix
• I tried to reproduce the issue when...
  • uMatrix is the only extension
  • uMatrix with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uMatrix
• I checked the documentation to understand that the issue I report is not a normal behavior
• I used the logger to rule out that the issue is caused by my ruleset

Description

After I upgraded to Firefox 71.0 i get the following error/exception when FF is started

JavaScript error: , line 0: uncaught exception: 2147746065
Extension error: TypeError: cookies is undefined moz-extension://86ce0190-77cd-41d0-82da-41a241cb7361/js/cookies.js 103
[[Exception stack
addCookiesToDict@moz-extension://86ce0190-77cd-41d0-82da-41a241cb7361/js/cookies.js:103:13
Current stack
applySafeWithoutClone@resource://gre/modules/ExtensionCommon.jsm:601:13
wrapPromise/</<@resource://gre/modules/ExtensionCommon.jsm:824:20
withLastError@resource://gre/modules/ExtensionCommon.jsm:743:14
wrapPromise/<@resource://gre/modules/ExtensionCommon.jsm:812:16
]]

Your environment

• uMatrix version: 1.4.0
• Browser Name and version: Firefox 71.0
• Operating System and version: Linux 5.4.2

[gwarser]

All green here: https://firefox-storage-test.glitch.me/ ?

[puchu]

Although I created a new profile the error showed up again but it seems I did something wrong. I couldn't reproduce the error with a new profile and after some investigation i found out that

privacy.firstparty.isolate - true

was the reason of the crash. Is there a way to use privacy.firstparty.isolate and still use uMatrix without a crash on startup, although the error is shown it seems that uMatrix works normal

[gwarser]

gorhill/uMatrix#878 ?

[gwarser]

cookies is undefined cookies.js:103
    addCookiesToDict moz-extension://37c2fedf-eb6b-47e9-b6b9-3442e36d36af/js/cookies.js:103
    apply self-hosted:1868
    applySafeWithoutClone resource://gre/modules/ExtensionCommon.jsm:595
    wrapPromise resource://gre/modules/ExtensionCommon.jsm:824
    withLastError resource://gre/modules/ExtensionCommon.jsm:743
    wrapPromise resource://gre/modules/ExtensionCommon.jsm:812

Unchecked lastError value: Error: First-Party Isolation is enabled, but the required 'firstPartyDomain' attribute was not set. vapi-background.js:594
    getAll moz-extension://37c2fedf-eb6b-47e9-b6b9-3442e36d36af/js/vapi-background.js:594

[uBlock-user]

Unchecked lastError value: Error: First-Party Isolation is enabled, but the required 'firstPartyDomain' attribute was not set. vapi-background.js:594
getAll moz-extension://37c2fedf-eb6b-47e9-b6b9-3442e36d36af/js/vapi-background.js:594

That's all I see on Nightly.

[gorhill]

I un-checked "using a new, unmodified browser profile" since user originally failed to disclosed he modified privacy.firstparty.isolate.

[opusforlife2]

@gorhill So does this confirm that the bug I experienced is caused by uMatrix and not Snowflake?

[gorhill]

The issue arises when using uMatrix with the setting privacy.firstparty.isolate set to true.

[uBlock-user]

I have privacy.firstparty.isolate toggled to true on Nightly and this appears --

[gorhill]

Duplicate of gorhill/uMatrix#878.