The SyntaxError caused by Selenium IDE: JSON.parse encounters an issue with a control character within a string literal

After installing Selenium IDE version 2.9.1, I encountered some errors while trying to use the tool. When starting Selenium IDE and attempting to open recent test cases, an error message was displayed:

An unexpected error occurred. Message: TypeError: this.app is undefined URL: chrome://selenium-ide/content/editor.js, line: 1013, column: 7 Editor.prototype.populateFormatsPopup@chrome://selenium-ide/content/editor.js:1013:7 onpopupshowing@chrome://selenium-ide/content/selenium-ide-sidebar.xul:1:1

In addition, upon opening Selenium IDE, another error message appeared:

An unexpected error occurred. Message: SyntaxError: JSON.parse: bad control character in string literal at line 1, column 1905 of the JSON data URL: chrome://selenium-ide/content/plugin.js, line: 17, column: 22 PluginManager.prototype.load@chrome://selenium-ide/content/plugin.js:17:22 PluginManager@chrome://selenium-ide/content/plugin.js:7:3 Application@chrome://selenium-ide/content/application.js:26:26 Editor@chrome://selenium-ide/content/editor.js:30:14 SidebarEditor@chrome://selenium-ide/content/sidebar-editor.js:22:5 onload@chrome://selenium-ide/content/selenium-ide-sidebar.xul:1:1

System Details:

  • Browser: Firefox 43 Language Hungarian
  • Selenium IDE Version: 2.9.1
  • Operating System: Windows 10*

I have already tried reinstalling the Selenium plugin from this link:

https://addons.mozilla.org/en-US/firefox/addon/selenium-ide/

Furthermore, I removed other Firefox plugins in an attempt to troubleshoot the issue.

If you have any suggestions or solutions to resolve this problem and enable me to use Selenium in Firefox successfully, please share. Thank you!

javascriptjsongoogle-chromeselenium

Answer №1

It appears that there may be an issue with Selenium IDE, which can be found on this link: https://example.com/selenium-ide-issue

A recommended solution is outlined below:

  1. Enter "about:config" into the address bar of Mozilla Firefox.
  2. Adjust the settings to default for [email protected] and extensions.selenium-ide.pluginsData.
  3. Close the browser and relaunch the IDE.

Answer №2

It's possible that the issue you're facing is due to a conflict with a JavaScript framework like mootools.

In my experience,

  1. When I run executeScript on document.title = 'Hello World';
    • it initially functions correctly
  2. However, when I load a webpage using an outdated version of mootools
  3. The executeScript on document.title = 'Hello World';
    • suddenly stops working and displays the error message "Failed: HH:MM:SS JSON.parse is not a function"

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