Ensure the temporary link element is removed after triggering the export action to prevent cluttering the DOM. Additionally, display a success message upon successful theme export for better user feedback.
Implemented theme import and export options in the Zen Theme Marketplace. Added buttons, event handlers, and logic for users to save themes to a file or load them from an external JSON file. Included success and error states for both actions.
Corrected a misspelling of "called" in a comment for better clarity and readability. No functional changes were made, as this was a non-code text adjustment.
Problem:
The Zen browser was experiencing random crashes when switching tabs, particularly
when creating a new tab with Ctrl+T and typing a URL. The crash logs showed
"CompositorBridgeChild receives IPC close with reason=AbnormalShutdown" errors,
indicating issues with the graphics compositor during tab switching operations.
This was caused by race conditions in the tab switching code and lack of proper
error handling when dealing with browser elements that might be in an invalid state.
Solution:
Instead of just catching errors, we've implemented a more robust solution that addresses
the root causes of the race conditions in the tab switching code:
1. State Management System:
- Added a queue-based system for tab operations to ensure they execute in sequence
- Implemented debouncing to prevent rapid tab switching that could cause race conditions
- Added state validation before operations to ensure browser elements are in a valid state
2. Asynchronous Operation Handling:
- Used Promises and async/await for proper sequencing of operations
- Added proper timing controls with small delays to ensure DOM is ready
- Implemented a mutex-like approach to prevent concurrent workspace changes
3. Robust Tab State Validation:
- Added comprehensive checks for tab validity before operations
- Implemented proper cleanup of resources to prevent memory leaks
- Added validation for browser window state to prevent operations on closed windows
4. Improved Error Recovery:
- Added fallback mechanisms when operations fail
- Implemented proper cleanup of state even when errors occur
- Added more informative error messages for better debugging
These changes make the browser much more robust when handling tab switching operations,
preventing the crashes reported in issue #7716.
