Responsive Navigation Patterns - Progressive web apps (PWAs)
pros: one button in header maximizes space for content on a small screen important items stay visiblein most screen sizes and you decide the item priorities legibility of navigation items is maintained with adequate spacing, by automatically hiding items that don't fit cons: navigation items might be less discoverable because some items are hidden in the drop-down or toggle menu users may not notice the button contains a navigation menu in the smallest screen size one more step is needed to access the hidden navigation items pattern 2: expandable bottom menu similar to the first pattern, the top navigation items rearrange for smaller widths until there is not enough space.
... pros: expandable menu is easy to discover important items are always visible and you decide the item priorities legibility of navigation items is maintained with adequate spacing, by automatically hiding items that don't fit cons: one more step is needed to access the navigation items that are hidden navigation items might be less discoverable because some items are hidden less space for content in the smallest screen size pattern 3: left hidden menu the main navigation is always on the left except in the smallest screen size, where the navigation menu is hidden in a button by default.
... pros: potentially displays more navigation items in a left navigation compared to a top navigation most items are always visible except in the smallest screen size one button in header maximizes space for content on a small screen cons: navigation items might be less discoverable because some items are hidden in the drop-down or toggle menu users may not notice the button contains a navigation menu in the smallest screen size one more step is needed to access the navigation items that are hidden ...

Introduction to progressive web apps - Progressive web apps (PWAs)
for example, web apps are more discoverable than native apps; it's a lot easier and faster to visit a website than to install an application, and you can also share web apps by simply sending a link.
...it should be: discoverable, so the contents can be found through search engines.

Progressive web apps (PWAs)
manifest file a json file that controls how your app appears to the user and ensures that progressive web apps are discoverable.
... pwa advantages pwas should be discoverable, installable, linkable, network independent, progressive, re-engageable, responsive, and safe.

Productization guide
the second purpose (demonstrate certain features of the product) is equally important: by providing these default services, we demonstrate particular features of the product, the ones which otherwise wouldn’t be as discoverable.

NSS 3.12.5 release_notes
ove unused make variable dso_ldflags bug 510436: add macros for build numbers (4th component of version number) to nssutil.h bug 511227: firefox 3.0.13 fails to compile on freebsd/powerpc bug 511312: nss fails to load softoken, looking for sqlite3.dll bug 511781: add new tls 1.2 cipher suites implemented in windows 7 to ssltap bug 516101: if pk11_importcert fails, it leaves the certificate undiscoverable by cert_pkixverifycert bug 518443: pk11_importandreturnprivatekey leaks an arena bug 518446: pk11_derencodepublickey leaks a certsubjectpublickeyinfo bug 518457: seckey_encodedersubjectpublickeyinfo and pk11_derencodepublickey are duplicate bug 522510: add deprecated comments to key.h and pk11func.h bug 522580: nss uses port_memcmp for comparing secret data.

Content Index API - Web APIs
concepts and usage as it stands, offline web content is not easily discoverable by users.