# uBlock Origin 1.72.3rc4

- Product: uBlock Origin (https://whatsnew.fyi/product/ublock-origin)
- Vendor: Raymond Hill
- Date: 2026-08-02
- Version: 1.72.3rc4
- Original notes: https://github.com/gorhill/uBlock/releases/tag/1.72.3rc4
- Permalink: https://whatsnew.fyi/product/ublock-origin/releases/1.72.3rc4
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Preserve whitespace characters in logger
- **changed** — Improve proxy-apply utility scriptlet
- **changed** — Improve abort-current-script scriptlet
- **changed** — Improve prevent-addEventListener scriptlet
- **added** — Add shim for piano-analytics.js
- **changed** — Improve trusted-click-element scriptlet
- **added** — Add prevent-clipboard-write scriptlet
- **changed** — Improve prevent-bab scriptlet
- **changed** — Increase RFC9535 compliance in jsonpath
- **fixed** — Fix dot notation before bracket notation validation

- [[logger] Preserve whitespace characters](https://github.com/gorhill/uBlock/commit/ef981d09b5)
- [Improve `proxy-apply` utility scriptlet](https://github.com/gorhill/uBlock/commit/be3bb05fce)
- [Improve `abort-current-script` scriptlet](https://github.com/gorhill/uBlock/commit/84e4bd7659)
- [Improve `prevent-addEventListener` scriptlet](https://github.com/gorhill/uBlock/commit/89fe40d73f)
- [Add shim for `piano-analytics.js`](https://github.com/gorhill/uBlock/commit/5dab3cbd24)
- [Improve `trusted-click-element` scriptlet](https://github.com/gorhill/uBlock/commit/bdd39fe606)
- [Add `prevent-clipboard-write` scriptlet](https://github.com/gorhill/uBlock/commit/735f61b8a4)
- [Improve `prevent-bab` scriptlet](https://github.com/gorhill/uBlock/commit/6772215c35)
- [[jsonpath] Increase RFC9535 compliance](https://github.com/gorhill/uBlock/commit/b123c23a4f)
- [Dot notation before bracket notation is not valid](https://github.com/gorhill/uBlock/commit/028ffdbea3)

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[Commits to Master Since This Release](https://github.com/gorhill/uBlock/compare/1.72.3rc4...master)

###### How to Install the Developer Build:

- **Firefox**: Download the build from [uBlock0_1.72.3rc4.firefox.signed.xpi](https://github.com/gorhill/uBlock/releases/download/1.72.3rc4/uBlock0_1.72.3rc4.firefox.signed.xpi)
  uBO works best on Gecko-based browsers, check out [why](https://github.com/gorhill/uBlock/wiki/uBlock-Origin-works-best-on-Firefox)
- **Chromium**: Install directly from the [Chrome Web Store](https://chromewebstore.google.com/detail/ublock-origin-development/cgbcahbpdhpcegmbfconppldiemgcoii)