Corrpution would occur when reading back serialized data which
contained multiple references to same instance of an object.
The issue could manifest when reading cache storage-related
data from the browser storage API, since the serializer is not
used when reading from indexedDB. Private/incognito mode
fall back on using browser storage API as cache storage.
Off the top of my head, I think the following conditions all
together could result in high likelihood of malfunction caused
by improperly deserializing data at launch time:
- Load from a selfie
- Selfie created after uBO ran for a while
- Selfie loaded from browser storage API (not the case by
default)
Possibly related to reports of uBO malfunctioning:
https://github.com/uBlockOrigin/uBlock-issues/issues/3217#event-12686416838
For internal use by filter list maintainers, do not open issues
about this. Left undocumented on purpose.
This new procedural operator allows to target elements in the
shadow root of an element.
subject:shadow(arg)
- Description: Look-up matching elements inside the shadow root (if
present) of _subject_.
- Chainable: Yes
- _subject_: Can be a plain or procedural selector.
- _arg_: A plain or a procedural selector for the elements to target
inside the shadowroot.
Example:
..##body > div:not([class]):shadow(div[style]):has(:shadow([data-i18n^="#ad"]))
Related issues:
- https://github.com/uBlockOrigin/uBlock-issues/issues/3161
- https://github.com/uBlockOrigin/uBlock-issues/discussions/2895#discussioncomment-8504374
Two checkboxes have been added to the "My filters "pane:
1. A checkbox to wholly disable/enable "My filters". This is equivalent
to the checkbox for "My filters" in "Filter lists" pane.
2. A checkbox to enable/disable the trustworthiness of the content
of "My filters". Default to untrusted.
Since toggling these checkboxes requires reloading all filter lists,
their new state must be committed through the "Apply changes" button.
Additionally: a "book" icon has been added to the top-right of the
dashboard, which is a link to the wiki according to whichever pane is
currently active.
This will make HTML filtering and `replace=` filter option less
likely to be bypassed by uBO, as the body response filterer
previously required an encoding to be expressly declared before
acting on the response body.
UTF-8 usage is currently reported as ~98.2%:
https://w3techs.com/technologies/history_overview/character_encoding
- Group "Pick" and "Preview"
- Set minimal button width
- Auto-minimize when picking instead of fully hiding the dialog:
this allows to quit while in picking mode
To disable collating global blocked/allowed counts.
Boolean, default to `false`.
Setting to `true` will prevent uBO from loading/saving global
blocked/allowed counts, and in such case the "Blocked since
install" count instead reflects the count since uBO launched.
Setting back to `false` will cause the counts to resume from
last time they were saved.
Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/3100
Turns out it's currently the fastest among the three currently
implemented (Cache, browser.storage.session, indexedDB). Possibly
because indexedDB can natively persist structure-cloneable data,
something uBO can now benefit with the work on abstracting away
the limitations of various storages being limited to persist only
text or JSON data.
Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/2969
In uBO, the "cache storage" is used to save resources which can
be safely discarded, though at the cost of having to fetch or
recompute them again.
Extension storage (browser.storage.local) is now always used as
cache storage backend. This has always been the default for
Chromium-based browsers.
For Firefox-based browsers, IndexedDB was used as backend for
cache storage, with fallback to extension storage when using
Firefox in private mode by default.
Extension storage is reliable since it works in all contexts,
though it may not be the most performant one.
To speed-up loading of resources from extension storage, uBO will
now make use of Cache API storage, which will mirror content of
key assets saved to extension storage. Typically loading resources
from Cache API is faster than loading the same resources from
the extension storage.
Only resources which must be loaded in memory as fast as possible
will make use of the Cache API storage layered on top of the
extension storage.
Compiled filter lists and memory snapshot of filtering engines
(aka "selfies") will be mirrored to the Cache API storage, since
these must be loaded into memory as fast as possible, and reloading
filter lists from their compiled counterpart is a common
operation.
This new design makes it now seamless to work in permanent private
mode for Firefox-based browsers, since extension storage now
always contains cache-related assets.
Support for IndexedDB is removed for the time being, except to
support migration of cached assets the first time uBO runs with
the new cache storage design.
In order to easily support all choices of storage, a new serializer
has been introduced, which is capable of serializing/deserializing
structure-cloneable data to/from a JS string.
Because of this new serializer, JS data structures can be stored
directly from their native representation, and deserialized
directly to their native representation from uBO's point of view,
since the serialization occurs (if needed) only at the storage
interface level.
This new serializer simplifies many code paths where data
structures such as Set, Map, TypedArray, RegExp, etc. had to be
converted in a disparate manner to be able to persist them to
extension storage.
The new serializer supports workers and LZ4 compression. These
can be configured through advanced settings.
With this new layered design, it's possible to introduce more
storage layers if measured as beneficial (i.e. maybe
browser.storage.session)
References:
- https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage/local
- https://developer.mozilla.org/en-US/docs/Web/API/Cache
- https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
