v4.1 is ready

It is on master branch of our github repo. You can use Toolbox -> Beta Test to give it a try.

Note: upgrade only from v3.6.4 to v4.1. Lower versions will result in an upgrade error. The error won’t cause any issue for your sites. Just the plugin itself will be deactivated by WP when WP detected any error. You will need to manual activate the plugin again if upgrade from v3.6.3- to v4.1.

Enjoy the new Guest Mode option. You don’t have to manually tune the page optimization settings back and forth anymore.

The new version v4.1 is already on WP. However, as this version contains substantial changes, the latest stable version on WP will keep on v3.6.4 for a while. Hopefully we can mark v4.0 as the latest stable version before end of May.

Here is the changelog:

= 4.1 – Jun 25 2021 =
* ??**UCSS/CCSS/LQIP** Moved queue storage to file system from database wp-options table to lessen the IO load. (#633504)
* ??**3rd** Added an option to disable ESI for the WooCommerce Cart. (#358 @anna Feng @astrid Wang)
* **ESI** Fixed an ESI nonce issue introduced in v4.0. (@Andrew Choi)
* **Object** Used new .litespeed_conf.dat instead of .object-cache.ini for object cache configuration storage.
* **Conf** Now updating related files after plugin upgrade and not just after activation.
* ??**Guest** Added a Guest Mode JS Excludes option. (@Ankit @mamac @rcverma)
* **Guest** Guest Mode now uses a lightweight script to update guest vary for reduced server load.
* **Guest** Guest Mode now adds missing image dimensions.
* **Guest** Guest vary will no longer update if there’s already a vary in place to address the infinite loop caused by CloudFlare’s incorrect cache control setting for PHP.
* **Guest** Guest vary update request will no longer be sent if lscache_vary is already set.
* **Guest** Added a Configurable Guest Mode UA/IP under the Tuning tab in the General menu.
* **Guest** Guest Mode now allows cron to be hooked, even when UCSS/CCSS options are off. (#338437 @stars)
* **Guest** Simplified the vary generation process under Guest Mode.
* **Guest** Added a Guest Mode HTML comment for easier debugging. (@Ruikai)
* **Guest** Guest vary update ajax now bypasses potential POST cache.
* **CCSS** Added back the options Separate CCSS Cache Post Types and Separate CCSS Cache URIs. (@Joshua @ankit)
* **CCSS** CCSS/UCSS queue is now limited to a maximum of 500 entries.
* **Control** The cache control constant LSCACHE_NO_CACHE will now have a higher priority than the Forced Public Cache setting.
* **Crawler** The Crawler can now crawl Guest Mode pages.
* **Crawler** Fixed a potential XSS vulnerability in the Crawler settings. (#927355)
* **Crawler** The Crawler now supports a cookie value of _null. (@Tobolo)
* **Media** Updated the default value for the Responsive Placeholder SVG to be transparent.
* **Media** WebP images in the background may now be served in Guest Mode.
* **Media** WebP images in CSS may now be bypassed if the requesting Guest Mode client doesnt support WebP.
* **Media** Fixed empty default image placeholder under Guest Mode.
* ??**Image Optimize** Changed the missing $_POST to $post_data so the database status is properly updated. (#345 @lucas)
* **Import** Export file is now readable to allow importing of partial configurations. (@Ryan D @joshua)
* **Page Optimize** Fixed W3 validator errors in Guest Mode. (#61393817)
* **3rd** A fatal WooCommerce error is no longer triggered by a custom theme reusing a previous LSCWP cache detection tag.
* **3rd** AMP may now bypass Guest Mode automatically.
* **Localize** Dropped the Localize Resources option as Guest Mode is a sufficient replacement. (Note: Due to user feedback during the development period, we have decided to reinstate this option in a future version.)
* **Cloud** Changed the WP API url.
* **Lang** Corrected a missing language folder.
* **GUI** Added a CCSS/UCSS loading page visualization. (#360 @astrid Wang @anna Feng)
* **GUI** Added a warning to indicate when Guest Mode CCSS/UCSS quota is in use. (#361 @astrid Wang @anna Feng)
* **GUI** Added a litespeed-info text color. (@Astrid Wang)
* **GUI** Implemented various UI/UX improvements. (@Joshua @lisa)
* **GUI** Duplicate cloud service messages with the same content will only display once now. (@Marc Dahl)
* **GUI** Added a WebP replacement warning for Guest Mode Optimization if WebP replacement is off.
* **Misc** Dropped wp_assets from distribution to reduce the package size. (@lowwebtech)
* **Misc** Increased the new version and score detection intervals.
* **Misc** Optimized WP Assets images. (#352 @lowwebtech)
* **Debug** Dropped the redudant error_log debug info.