New Features in Ver 4.4

・Features
　・Opening a page of the sidebar in a new tab
　　It can open a page of the sidebar now. This feature is available on other extension that uses sidebar also.

New Features in Ver 4.3

・Features
　・Synchronization
　　Synchronizing options is supported now.

New Features in Ver 4.2

・Features
　・Text Selection
　　Text selection in the sidebar is enabled.

New Features in Ver 4.1

・Features
　・Shortcut
　　Users can open with a shortcut key. The default is "Alt+O". The shortcut key can be edited (refer to this link).
　・Protocol Detection
　　The extension can detect a protocol of a target whether http or https now. A user does not need to have a choice which is http when target is https. However, bookmark and selection does not support this.
　・Toolbar Icon
　　A user can choose behavior of the toolbar icon at the options page whether reloading or toggling. The default is reload.

・Others
　・For Developers
　　Refactor code.

New Features in Ver 4.0

・Features
　・User Agent
　　Changing the user agent is available. This feature requires a host permission. Open the options page and enable the host permission to enable this feature. This feature effects all pages of extensions which you have installed.

・Others
　・For Users
　　Fix problem which some options are not saved correctly.
　・For Developers
　　Refactor code.

New Features in Ver 3.2

・Features
　・Icon
　　Options can be opened from a menu which is displayed by right-clicking the icon.

　・Fixes
　　Fix a minor bug.

　・UI
　　Change appearance slightly.

・Others
　・For Developers
　　Fix a bug which storageKeys.viewSourceFromBookmark is not used. This extension worked without an error because undefined was used for the key instead of storageKeys.viewSourceFromBookmark.
　　Refactor code.
　　Fetch API replaces XmlHttpRequest.
　　Fix a bug which view-source fails in a page of displaying a page which is https.

New Features in Ver 3.1.0

・Sidebar
　A placement of a sidebar is available. You can choose opening the page in all sidebars or not. For more details, see the options page.

New Features in Ver 3.0.3

・Fixes
　Fix the problem which "Initial Location" does not work.

New Features in Ver 3.0

・Features
　・Efficiency
　　Fix inefficient processes. This removes the delay of displaying.
　・Additional Permissions
　　You can allow additional permissions on the options page. Currently, it supports only bookmark permission.
　・Options
　　Add http/https selections for "Open this page".
　　Add additional permissions.
　・Browser compatibility
　　Change the oldest version of support 60 to 57.
　・Fixes
　　Fix the problem which "view source" does not work if the url has already the "view-source:" prefix.
・Others
　・For Developers
　　Split all processes into functions. All sources are more readable now.
　　Add all project files into the solution.

New Features in Ver 2.2.1

・Fixes
　Fix the problem which "Open this page" is not displayed when it enables only https.

New Features in Ver 2.2

・Features
　・Icon
　　When clicking the icon, the sidebar can reload the displaying page even if it was opened from the context menu.
　・Tab
　　Selected tab and current page can be opened in the sidebar now.

New Features in Ver 2.1

・Features
　・Icon
　　The icon of this addon has been added to the tool bar. The sidebar is displayed / reloaded quickly by pressing it. You can remove this icon if you don't need it.
　・Options
　　Now you can fix the initial page of the sidebar. This is useful for websites that list so many links.
・Others
　・For Developers
　　Remove values that are not in use from English messages.json.
　　Remove values that are not in use from index.css.

New Features in Ver 2.0

・Features
　・Options
　　You can define preferences for the extension in the page of add-on.
　　To choose a protocol and targets, you can open the sidebar quicker.
　　These preferences are different from series of a popup, a user can define what targets should be disabled.
　　However, you cannot disable audio, images and videos(I don't think that we don't need to disable it).
・Others
　・For Developers
　　Japanese files and English files exist until this version, but all descriptions are moved to message.json and files of "_ja" have been omitted.
　　Information of preferences have been written in json files.
　　The target version is fixed to 60.0 or higher.
　　All files are converted to UTF8.