This doesn't change behavior, but I wrote them while debugging my patch
for bug 1076583. We no longer have the picture prefs and so on, and this
made it reasoning about it slightly easier.
Differential Revision: https://phabricator.services.mozilla.com/D218062
The patch implements using SipHash to generate canvas randomization key.
The implementation is behind a pref
"privacy.resistFingerprinting.randomization.canvas.use_siphash".
Differential Revision: https://phabricator.services.mozilla.com/D216278
Inline Create() and Realloc() so that we don't get negative leaks, since
were that code end up in mozglue, it wouldn't have access to the logging
machinery.
Differential Revision: https://phabricator.services.mozilla.com/D209663
In bug 1883435 comment 2 chutten mentions that including
nsGlobalWindowInner.h from GleanMetrics.h causes a stylo build failure.
This is because nsGlobalWindowInner.h itself brings a bunch of DOM
bindings template soup that bindgen isn't great at dealing with.
That can be fixed in various ways. However, there is a simpler fix,
which is not including GleanMetrics at all.
It's trivial to do, and given it's a massive autogenerated file, and
Document.h is a very common header, it's worth doing this if only for
build times.
Fix a bunch of unused includes while at it.
Differential Revision: https://phabricator.services.mozilla.com/D203625
This patch adds fetchpriority support for the `<img>` element, also
exposing the corresponding attribute in the WebIDL. As in D197493, we
try and minimize the change and rely on a mapping configurable under a
preference to ease future experiments. We use initial mapping
PRIORITY_LOW/PRIORITY_HIGH/PRIORITY_LOW for fetchpriority=low/high/auto
and allow further adjustments in the image code.
Internal fetchpriority mapping is covered by the following tests:
- `image-initial-load.h2.html` (typos fixed here)
- `image-dynamic-load.h2.html`
DOM tests are covered by the following tests (pref enabled to make them
pass):
- `idlharness.https.html`
- `attr-img-fetchpriority.html`
Differential Revision: https://phabricator.services.mozilla.com/D202222
This patch adds fetchpriority support for `<link rel=preload as=image>`
and equivalent HTTP Link header. The fetchpriority value is passed from
where the link is parsed down to `NewImageChannel` where the priority
is initially set. Currently, the default equals PRIORITY_LOW, but is
decreased a bit if LOAD_BACKGROUND flag is set (this is always the case
for link preload images, see `imgLoader::LoadImage`). Later, the
priority can be increased again depending on the category (see
`imgRequest::BoostPriority`).
In order to minimize the changes, the new calculation is to keep the
initial setting to PRIORITY_LOW, adjust it using a new
`network.fetchpriority.adjustments.*` preference depending on the
fetchpriority attributes, and then preserve further adjustments for
LOAD_BACKGROUND and `BoostPriority`.
For the default value `fetchpriority=auto`, there is no adjustment
i.e. we continue to start with PRIORITY_LOW. `fetchpriority=low/high`
are respectively mapped to PRIORITY_LOW/PRIORITY_HIGH which is simple
and consistent with the "Image" cases from Google's web.dev article
https://web.dev/articles/fetch-priority. These values could of course
be revised in the future after more experiments.
This change is covered by the following tests below. The expectations
is modified to match what is described above (i.e. map to PRIORITY_LOW
or PRIORITY_HIGH with adjustment due to LOAD_BACKGROUND):
- `link-initial-preload-image.h2.html`
- `link-dynamic-preload-image.h2.html`
- `kPipeHeaderPreloadImageLinks`
Based on a patch by Mirko Brodesser ([email protected])
Differential Revision: https://phabricator.services.mozilla.com/D197493
This patch adds fetchpriority support for `<link rel=preload as=image>`
and equivalent HTTP Link header. The fetchpriority value is passed from
where the link is parsed down to `NewImageChannel` where the priority
is initially set. Currently, the default equals PRIORITY_LOW, but is
decreased a bit if LOAD_BACKGROUND flag is set (this is always the case
for link preload images, see `imgLoader::LoadImage`). Later, the
priority can be increased again depending on the category (see
`imgRequest::BoostPriority`).
In order to minimize the changes, the new calculation is to keep the
initial setting to PRIORITY_LOW, adjust it using a new
`network.fetchpriority.adjustments.*` preference depending on the
fetchpriority attributes, and then preserve further adjustments for
LOAD_BACKGROUND and `BoostPriority`.
For the default value `fetchpriority=auto`, there is no adjustment
i.e. we continue to start with PRIORITY_LOW. `fetchpriority=low/high`
are respectively mapped to PRIORITY_LOW/PRIORITY_HIGH which is simple
and consistent with the "Image" cases from Google's web.dev article
https://web.dev/articles/fetch-priority. These values could of course
be revised in the future after more experiments.
This change is covered by the following tests below. The expectations
is modified to match what is described above (i.e. map to PRIORITY_LOW
or PRIORITY_HIGH with adjustment due to LOAD_BACKGROUND):
- `link-initial-preload-image.h2.html`
- `link-dynamic-preload-image.h2.html`
- `kPipeHeaderPreloadImageLinks`
Based on a patch by Mirko Brodesser ([email protected])
Differential Revision: https://phabricator.services.mozilla.com/D197493
Frederik Braun