Commit Graph

7 Commits

Author SHA1 Message Date
Raymond Hill 98977971db
[mv3] Improve generic cosmetic filtering surveyor 2024-05-28 22:08:24 -04:00
Raymond Hill 8ea1bac80b
Trim end of class tokens in generic cosmetic filtering's surveyor
Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/3257
2024-05-28 18:42:06 -04:00
Raymond Hill a969a672e0
Change official description in source code top comment 2023-12-04 12:10:34 -05:00
Raymond Hill 6dbbb95b04
[mv3] Mitigation: Inject CSS user styles to enforce cosmetic filtering
Related issues:
- https://github.com/uBlockOrigin/uBOL-issues/issues/5#issuecomment-1575425913
- https://github.com/w3c/webextensions/issues/403

Currently, there is no other way to inject CSS user styles than to
wake up the service worker, so that it can inject the CSS styles
itself using the `scripting.insertCSS()` method.

If ever the MV3 API supports injecting CSS user styles directly
from a content script, uBOL will be back to be fully declarative.

At this point the service worker is very lightweight since the
filtering is completely  declarative, so this is not too much of
an issue performance-wise except for the fact that waking up the
service worker for the sole purpose of injecting CSS user styles
and nothing else introduces a pointless overhead.

Hopefully the MV3 API will mature to address such inefficiency.
2023-06-04 11:32:55 -04:00
Raymond Hill cbfd2ad942
Create a MVP version of uBOLite for Firefox
What does not work at the time of commit:

Cosmetic filtering does not work:

The content scripts responsible for cosmetic filtering fail when
trying to inject the stylesheets through document.adoptedStyleSheets,
with the following error message:

  XrayWrapper denied access to property Symbol.iterator
  (reason: object is not safely Xrayable).
  See https://developer.mozilla.org/en-US/docs/Xray_vision for more
  information. ... css-declarative.js:106:8

A possible solution is to inject those content scripts in the
MAIN world. However Firefox scripting API does not support MAIN
world injection at the moment.

Scriptlet-filtering does not work:

Because scriptlet code needs to be injected in the MAIN world,
and this is currently not supported by Firefox's scripting API,
see https://bugzilla.mozilla.org/show_bug.cgi?id=1736575

There is no count badge on the toolbar icon in Firefox, as it
currently does not support the `DNR.setExtensionActionOptions`
method.

Other than the above issues, it does appear uBO is blocking
properly with no error reported in the dev console.

The adoptedStyleSheets issue though is worrisome, as the
cosmetic filtering content scripts were designed with ISOLATED
world injection in mind. Being forced to inject in MAIN world
(when available) make things a bit more complicated as uBO
has to ensure it's global variables do not leak into the page.
2023-04-07 10:19:43 -04:00
Raymond Hill b603e9e81e
Various code review related to extended filtering
Bring latest changes to procedural cosmetic filtering to uBOL.

Fix procedural filtering used in HTML filters.

Standardize quick hash algorithm used throughout to DJB2
(except that initialization step is skipped):
- http://www.cse.yorku.ca/~oz/hash.html#djb2
2022-12-13 10:23:51 -05:00
Raymond Hill 1db3748ab1
[mv3] General code review
Re-arranged resources in a more tidy way. General code review of
various code paths.
2022-10-15 13:05:20 -04:00