Popa v. Microsoft Corporation

CourtCourt of Appeals for the Ninth Circuit
DecidedAugust 26, 2025
Docket24-14
StatusPublished

This text of Popa v. Microsoft Corporation (Popa v. Microsoft Corporation) is published on Counsel Stack Legal Research, covering Court of Appeals for the Ninth Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Popa v. Microsoft Corporation, (9th Cir. 2025).

Opinion

FOR PUBLICATION

UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT

ASHLEY POPA, individually and on No. 24-14 behalf of all others similarly situated, D.C. No. 2:23-cv-00294- Plaintiff - Appellant, JLR v. OPINION MICROSOFT CORPORATION,

Defendant - Appellee.

Appeal from the United States District Court for the Western District of Washington James L. Robart, District Judge, Presiding

Argued and Submitted January 16, 2025 Pasadena, California

Filed August 26, 2025

Before: JOHNNIE B. RAWLINSON and MILAN D. SMITH, JR., Circuit Judges, and JED S. RAKOFF, District Judge. *

Opinion by Judge Jed S. Rakoff

* The Honorable Jed S. Rakoff, United States District Judge for the Southern District of New York, sitting by designation. 2 POPA V. MICROSOFT CORPORATION

SUMMARY **

Article III Standing

The panel affirmed the district court’s order dismissing for lack of Article III standing Ashley Popa’s diversity putative class action against Microsoft Corporation concerning the use of session-replay technology. Session-replay technology allows a business to capture and reproduce customers’ interactions with its website. Popa encountered session-replay technology during a visit to http://petsupplies.com. The website’s operator employed the session-replay technology known as “Clarity,” which is owned and operated by Microsoft. The panel held that Popa failed to allege a “concrete” injury sufficient to support Article III standing. In determining whether a plaintiff’s injury is concrete, TransUnion LLC v. Ramirez, 594 U.S. 413 (2021), requires a court to assess whether an individual plaintiff has suffered a harm that has traditionally been actionable in our nation’s legal system. Popa pointed to the common-law privacy torts of intrusion upon seclusion and public disclosure of private facts, but both analogies faltered. Popa did not explain how the tracking of her interactions with the website caused her to experience any kind of harm remotely similar to the highly offensive interferences or disclosures that were actionable at common law.

** This summary constitutes no part of the opinion of the court. It has been prepared by court staff for the convenience of the reader. POPA V. MICROSOFT CORPORATION 3

COUNSEL

Connor P. Hayes (argued), Jamisen A. Etzel, and Gary F. Lynch, Lynch Carpenter LLP, Pittsburgh, Pennsylvania; Kim D. Stephens, Tousley Brain Stephens PLLC, Seattle, Washington; for Plaintiff-Appellant. Eric B. Wolff (argued), Nicola Menaldo, and Anna M. Thompson, Perkins Coie LLP, Seattle, Washington; James G. Snell, Perkins Coie LLP, Palo Alto, California; for Defendant-Appellee. Aileen McGrath and Zach Z. Tan, Akin Gump Strauss Hauer & Feld LLP, San Francisco, California; Deborah R. White and Larissa M. Whittingham, Retail Litigation Center Inc., Washington, D.C.; for Amicus Curiae Retail Litigation Center. Jeremy J. Broggi, Megan L. Brown, and Joel S. Nolette, Wiley Rein LLP, Washington, D.C.; Jonathan D. Urick and Maria C. Monaghan, U.S. Chamber Litigation Center, Washington, D.C.; Cory L. Andrews and John M. Masslon II, Washington Legal Foundation, Washington, D.C.; Christopher J. Marchese and Paul D. Taske, NetChoice LLC, Washington, D.C.; Lartease M. Tiffith, Interactive Advertising Bureau; for Amici Curiae The Chamber of Commerce of the United States of America, Washington Legal Foundation, NetChoice LLC, and The Interactive Advertising Bureau. 4 POPA V. MICROSOFT CORPORATION

OPINION

RAKOFF, District Judge:

This case centers on the use of so-called “session-replay technology.” In simple terms, session-replay technology allows a business to capture and reproduce customers’ interactions with its website. More technically, the software “embed[s] snippets of JavaScript computer code” on a website, “which then deploys on each website visitor’s internet browser for the purpose [of] intercepting and recording the website visitor’s electronic communications with the . . . website, including their mouse movements, clicks, keystrokes . . . , URLs of web pages visited, and/or other electronic communications in real-time.” The session- replay provider then “use[s] those [w]ebsite [c]ommunications to recreate website visitors’ entire visit to” the website. A business utilizing this technology can then access useful consumer data, including “detailed heatmaps of a website that provide information about which elements of a website have high user engagement, how far website users scrolled on the website, and the total clicks within a given area on the website.” In essence, session-replay technology helps a business to determine which parts of its website are effective with customers and which are not. Plaintiff Ashley Popa encountered session-replay technology during a visit to https://www.petsuppliesplus.com. Defendant PSP Group LLC (“PSP”)—the website’s operator—employed on its website the session-replay technology known as “Clarity,” which is owned and operated by co-defendant Microsoft Corp. (“Microsoft”). According to the amended complaint, “Clarity organizes the information it captures into over 30 POPA V. MICROSOFT CORPORATION 5

different categories including: the date a user visited the website, the device the user accessed the website on, the type of browser the user accessed the website on, the operating system of the device used to access the website, the country where the user accessed the website from, a user’s mouse movements, a user’s screen swipes, text inputted by the user on the website, and how far down a webpage a user scrolls.” Popa focuses her allegations on specific pieces of information allegedly collected by Clarity. She states that during visits to PSP’s website, she “brow[s]ed for pet supplies” and “communicated with PSP’s website by using her mouse to hover and click on certain products.” She explains that “if a website user views a certain product offered for sale, that information is captured by Microsoft Clarity embedded on the website.” While Popa also alleges that a user’s mailing address is captured when entered for delivery information, the screenshot produced in the complaint indicates that masking software—a function that limits what information Clarity collects—omitted the street number and zip code. 1 She claims that “PSP and [s]ession [r]eplay [p]roviders use those [w]ebsite [c]ommunications to recreate website visitors’ entire visit to https://www.petsuppliesplus.com,” in order to “create a video replay of the user’s behavior on the website and provide it to PSP for analysis.”

1 The complaint describes “three standard approaches when it comes to masking sensitive information collected from a user’s interaction with a website”: “strict (all text entered by a user is purportedly masked), balanced (sensitive text entered into certain specifically pre-coded fields, such as passwords, and credit card information, is masked), and relaxed (no text entered by a user is masked).” Microsoft submitted a webpage— which was cited as a link in the complaint—that indicates that Clarity’s default setting is “balanced.” 6 POPA V. MICROSOFT CORPORATION

In September 2022, Popa filed a complaint, on behalf of a proposed class of visitors to PSP’s website, in the United States District Court for the Western District of Pennsylvania. In February 2023, Popa filed an amended complaint. The amended complaint, which is the operative pleading, brings two claims against both PSP and Microsoft. Popa’s first claim arises under Pennsylvania’s Wiretapping and Electronic Surveillance Control Act (“WESCA”), which grants a civil cause of action to an injured party against any person who, among other prohibited conduct, acquires “the contents of any wire, electronic or oral communication through the use of any electronic, mechanical or other device.” 18 Pa. Cons. Stat.

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Popa v. Microsoft Corporation, Counsel Stack Legal Research, https://law.counselstack.com/opinion/popa-v-microsoft-corporation-ca9-2025.