[Wikidata-bugs] [Maniphest] T298001: Wikidata claims editor is broken after December 2021 update on Firefox v52

[Bugreporter]

Bugreporter added a project: Browser-Support-Firefox.
Bugreporter added a comment.


  Firefox 52 is not a Grade A browser, though we does not yet declare an 
explicit unsupport of it.

TASK DETAIL
  https://phabricator.wikimedia.org/T298001

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Bugreporter
Cc: Bugreporter, Ivan_A_Krestinin, Aklapper, Invadibot, maantietaja, Akuckartz, 
Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, 
rosalieper, Scott_WUaS, Wikidata-bugs, aude, Mbch331, Jay8g
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[Wikidata-bugs] [Maniphest] T298001: Wikidata claims editor is broken after December 2021 update on Firefox v52

[Ivan_A_Krestinin]

Ivan_A_Krestinin created this task.
Ivan_A_Krestinin added a project: Wikidata.
Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION
  I am failed to edit any statements on any Wikidata item. "Edit" link is 
missed. Also I can not expand references section.
  F34888796: item_editing.png 
  
  Messages from browser console:
  F3402: console_messages.PNG 
  
  Most probably this is related to browser version: Firefox ESR x32 v52.9.0 (it 
is the latest version available for WinXP. Answers to possible questions: I can 
not update to more modern version of Windows because have some hardware 
incompatible with never versions. I know about security issues in old software, 
the issues are closed using other ways than OS upgrade).
  
  The issue appears between 2021-12-15 and 2021-12-17. Everything worked fine 
before December 16 or 17. Only Wikidata items editor is broken. Usual pages 
editor works fine both on Wikidata and Wikipedia.
  
  What I try already without success:
  
  - clear browser cache, cookies and other information
  - private mode
  - logout
  - disabling all gadgets
  - commenting everything on custom CSS and custom JavaScript
  - different themes
  - add ?debug=1 to item URL
  - another browser (Opera v36.0.2130.80)

TASK DETAIL
  https://phabricator.wikimedia.org/T298001

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Ivan_A_Krestinin
Cc: Ivan_A_Krestinin, Aklapper, Invadibot, maantietaja, Akuckartz, Nandana, 
Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, 
Scott_WUaS, Wikidata-bugs, aude, Mbch331
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