Firefox indicates that the webpages download failed.

[S3ndG]

Prerequisites

• I verified that this is not a filter issue
  • Filter issues MUST be reported at filter issue tracker
• This is not a support issue or a question
  • Support issues and questions are handled at /r/uBlockOrigin
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uBlock Origin
• I checked the documentation to understand that the issue I report is not a normal behavior

Description

When I try to save a FULL webpage (with the pictures, not just the html part) with some blocked stuff inside, Firefox tells me that the download failed. Which is wrong.

A specific URL where the issue occurs

https://www.freenews.fr/freenews-edition-nationale-299/une-collecte-organisee-pour-fabriquer-des-visieres-de-protection-en-3d-par-nos-makers-et-pour-les-soignants

Steps to Reproduce

1. Go to that webpage.
2. Do Ctrl+S, select FULL webpage
3. Click on Save

Expected behavior:

The download icon of firefox should be blue and indicates that the download succeded.

Actual behavior:

The download icon shows an orange circle and says it failed.

Your environment

• uBlock Origin version: 1.26.0
• Browser Name and version: firefox 75.0 64 bits
• Operating System and version: windows 10 64 bits

[gwarser]

Expected behavior:

The download icon of firefox should be blue and indicates that the download succeded.

Everything what is blocked is blocked, everything allowed is allowed?

I that case it's not uBO issue, but Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1445211

[gwarser]

@gorhill, from bug 1445211#c41:

We won't know the (internal equivalent of the) parentFrameId here, at least for now. It's possible the refactor in bug 1576188 will help with that though.

Something specific that would help? [What would help uBO to correctly whitelist.]

[gorhill]

I don't see an issue, when I disable uBO on https://www.freenews.fr/, "Save As..." works without error on my side. uBO uses the documentUrl property when tabId is -1. I don't see parentFrameId being used in uBO when tabId is -1.

[gorhill]

And to be sure, I put breakpoints in code paths where uBO cancels network requests or change response headers and none were taken when I saved the document after I disabled uBO on that site. So I can't reproduce the error reported by the user , except when I do not disable uBO.