对于开发人员的 Firefox 78

调试器

• 现在，你可以从关于：调试面板更改远程设备访问的 URL。(Firefox bug 1617237)
• 现在，调试器中的 禁用 JavaScript 菜单项仅影响当前选项卡，并且在关闭“开发人员工具”后会重置。(Firefox bug 1640318)
• 如果在作用域中启用映射，则日志点 (en-US)可以将源映射代码中的变量名称映射回其原始名称。(Firefox bug 1536857)

网络监控器

• In the Network Monitor (en-US), you can now resize the columns of the request list by dragging the column borders anywhere in the table. (Firefox bug 1618409)
• The request details panel in the Network Monitor has some UX improvements. (Firefox bug 1631302, Firefox bug 1631295)
• If a request was blocked, the request list (en-US) now shows the reason, such as an add-on, CSP, CORS, or Enhanced Tracking Protection. (Firefox bug 1555057, Firefox bug 1445637, Firefox bug 1556451)

其他工具

• The Accessibility inspector is out of beta. You can use it to check for various accessibility issues on your site. (Firefox bug 1602075)
• Uncaught promise errors now provide all details in the Console, including their name and stack. (Firefox bug 1636590)

• The :is() and :where() pseudo-classes are now enabled by default (Firefox bug 1632646).
• The :read-only and :read-write pseudo-classes are now supported without prefixes (Firefox bug 312971).
  • In addition, :read-write styles are no longer applied to disabled <input> and <textarea> elements, which was a violation of the HTML spec (Firefox bug 888884).

• The Intl.ListFormat API is now supported (Firefox bug 1589095).
• The Intl.NumberFormat() (en-US) constructor has been extended to support new options specified in the Intl.NumberFormat Unified API Proposal (Firefox bug 1633836). This includes among other things:
  • Support for scientific notations (en-US)
  • Unit (en-US), currency (en-US) and sign display (en-US) formatting
• The RegExp engine has been updated and now supports all new features introduced in ECMAScript 2018:
  • Lookbehind assertions (Firefox bug 1225665)
  • RegExp.prototype.dotAll (Firefox bug 1361856)
  • Unicode property escapes (Firefox bug 1361876)
  • Named capture groups (Firefox bug 1362154)
• Due to a WebIDL spec change in mid-2020, we've added a Symbol.toStringTag property to all DOM prototype objects (Firefox bug 1277799).
• The garbage collection of WeakMap objects has been improved. WeakMaps are now marked incrementally (Firefox bug 1167452).

DOM

• The ParentNode.replaceChildren() (en-US) method has been implemented (Firefox bug 1626015).

服务工作者

• Extended Support Releases (ESR): Firefox 78 is the first ESR release that supports Service workers (and the Push API). Earlier ESR releases had no support (Firefox bug 1547023).

• Wasm Multi-value is now supported, meaning that WebAssembly functions can now return multiple values, and instruction sequences can consume and produce multiple stack values (Firefox bug 1628321).
• WebAssembly now supports import and export of 64-bit integer function parameters (i64) using BigInt from JavaScript (Firefox bug 1608770).

• 所有浏览器都不再支持传输层安全 (TLS) 协议的 1.0 和 1.1 版本。阅读TLS 1.0 和 1.1 删除更新以获取先前的公告，以及如果受到影响应采取的措施 (Firefox bug 1643229).

• browsingData.removeCache (en-US) 和 browsingData.removePluginData (en-US) 现在支持按主机名删除。(Firefox bug 1636784).
• 使用proxy.onRequest (en-US)时，现在可以正确应用基于选项卡 ID 或窗口 ID 限制的过滤器。这对于希望仅在一个窗口中提供代理功能的加载项很有用。
• 现在，从“所有选项卡”下拉菜单中单击上下文菜单 (en-US)即可传递适当的选项卡对象。过去，活动选项卡被错误地传递了。
• 当使用带有另存为选项的downloads.download时，可以记住最近使用的目录。尽管此信息对开发人员用处不大，但对用户而言却非常方便。