Ima SDK 3.69.0 Error (Probably from 26.09.2025) - Can't find variable: URLSearchParams inside bridge script

[Witalij Parszenko]

One-Line Summary: A ReferenceError for URLSearchParams occurs inside the bridge iframe when loading ads with the latest IMA SDK, causing ad failures on older browsers.

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Description

When an ad is requested using the latest version of the IMA SDK, the SDK's bridge iframe (bridge{version}_pl.html) executes code that calls URLSearchParams. However, on environments that do not have native support for this API (such as older browsers), a fatal ReferenceError: Can't find variable: URLSearchParams is thrown.

This suggests that the isolated iframe environment for the ad creative does not include the necessary polyfill for URLSearchParams. The error breaks the ad rendering process.

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Environment

• SDK: Google IMA SDK for HTML5

• Version: Latest (as of September 2025)

• Context: Ad loading within a cross-origin "bridge" iframe created by the IMA SDK.

• Browsers Affected: Environments without native URLSearchParams support (e.g., Internet Explorer 11, older versions of other browsers).

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Steps to Reproduce

1. Integrate the latest version of the Google IMA SDK on a webpage.

2. Request a VAST ad on a browser environment that requires a URLSearchParams polyfill.

3. Observe the browser's developer console.

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Expected Result

The ad should load and play correctly. The IMA SDK's internal iframe should be self-contained and provide any necessary polyfills (like URLSearchParams) to ensure compatibility with its supported environments.

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Actual Result

A ReferenceError is thrown from within the SDK's bridge iframe, preventing the ad from loading. See the attached console screenshot for details.

Suggested Fix: Please include a polyfill for URLSearchParams within the bridge iframe's context to ensure backward compatibility.