We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

1. Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
2. Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

I think Yahoo Finance use the Flash plugin for stock charts, so Flash is the likely culprit here. If this problem came on with the recent release of Flash 19, perhaps consider switching to the extended support release of Flash 18.

Adobe offers Flash 18.0.0.241 (with security updates) further down on this page: https://www.adobe.com/products/flashplayer/distribution3.html -- it's the version for plugin-based browsers, and either the MSI or EXE format should work.

However, you might first need to remove Flash 19 before you can install an older version. This article has a link to the uninstaller: https://helpx.adobe.com/flash-player/.../uninstall-flash-player-windows.html.