LibreJS

browser add-on to block nonfree nontrivial JavaScript
Thing firefox_extension Q17940363
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LibreJS

Summary

LibreJS is a Firefox extension[1]. LibreJS draws 112 Wikipedia views per month (firefox_extension category, ranking #6 of 12).[2]

Key Facts

  • LibreJS is the creator of Loic J. Duros[3].
  • LibreJS's instance of is recorded as Firefox extension[4].
  • LibreJS's instance of is recorded as GNU package[5].
  • LibreJS's instance of is recorded as free software[6].
  • LibreJS's maintained by is recorded as Rubén Rodríguez Pérez[7].
  • LibreJS's maintained by is recorded as Yuchen Pei[8].
  • LibreJS is associated with the free software movement movement[9].
  • LibreJS's developer is recorded as GNU Project[10].
  • LibreJS's copyright license is recorded as Q27016754[11].
  • LibreJS's operating system is recorded as Q3251801[12].
  • LibreJS's operating system is recorded as BSD[13].
  • LibreJS's operating system is recorded as cross-platform[14].
  • LibreJS's software version identifier is recorded as 6.0.6[15].
  • LibreJS's software version identifier is recorded as 6.0.7[16].
  • LibreJS's software version identifier is recorded as 6.0.8[17].
  • LibreJS's software version identifier is recorded as 6.0.9[18].
  • LibreJS's software version identifier is recorded as 6.0.10[19].
  • LibreJS's software version identifier is recorded as 6.0.13[20].
  • LibreJS's software version identifier is recorded as 7.20.2[21].
  • LibreJS's software version identifier is recorded as 7.20.1[22].
  • LibreJS's software version identifier is recorded as 7.20.3[23].
  • LibreJS's software version identifier is recorded as 7.21.0[24].
  • LibreJS's software version identifier is recorded as 6.0.5[25].
  • LibreJS's software version identifier is recorded as 7.21.1[26].
  • LibreJS is part of GNU Project[27].

Body

Definition and Type

Recorded instance of include Firefox extension[4], GNU package[5], and free software[6].

Origins

2011 marks the founding of LibreJS[28].

Use and Application

LibreJS is used for browser extension[29]. LibreJS is part of GNU Project[27]. LibreJS's used by is recorded as GNU IceCat[30].

Movements and Schools

LibreJS is associated with the free software movement movement[9].

Why It Matters

LibreJS draws 112 Wikipedia views per month (firefox_extension category, ranking #6 of 12).[2] LibreJS has Wikipedia articles in 9 language editions, a strong signal of global cultural recognition.[31] LibreJS is known by 13 alternative names across languages and contexts.[32]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . Retrieved . wikidata.org.
  3. [6] ↑ . wikidata.org.
  4. [7] ↑ . wikidata.org.
  5. [8] ↑ . wikidata.org.
  6. [9] ↑ . wikidata.org.
  7. [3] ↑ . Retrieved . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . Free Software Directory. Retrieved . wikidata.org.
  10. [12] ↑ . Free Software Directory. Retrieved . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  14. [16] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  15. [17] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  16. [18] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  17. [19] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  18. [20] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  19. [21] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  20. [22] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  21. [23] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  22. [24] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  23. [25] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  24. [26] ↑ . lists.gnu.org. Retrieved . lists.gnu.org. Provenance: wikidata.org.
  25. [27] ↑ . Retrieved . wikidata.org.
  26. [29] ↑ . wikidata.org.
  27. [28] ↑ . wikidata.org.
  28. [30] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [31] ↑ . Wikidata sitelinks. wikidata.org.
  3. [32] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). LibreJS. Retrieved October 2, 2026, from https://4ort.xyz/entity/librejs
MLA “LibreJS.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Oct. 2026, https://4ort.xyz/entity/librejs.
BibTeX @misc{4ortxyz_librejs_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{LibreJS}}, year = {2026}, url = {https://4ort.xyz/entity/librejs}, note = {Accessed: 2026-10-02}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): LibreJS — https://4ort.xyz/entity/librejs (retrieved 2026-10-02)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 5w ago · Mrwdat3 · 2026-08-27 view diff on Wikidata ↗
    Developer → —
    Maintained by → Loic J. Duros, Rubén Rodríguez Pérez, Yuchen Pei
    Aliases → —
    Inception → +2011-00-00T00:00:00Z
    + 26 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P2537]]: LibreJS, [[:toollabs:quickstatements/#/batch/269572|batch #269572]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.